I have a confession. There are at least forty books on my shelves right now that I have never read. Some have been sitting there for years, spines uncracked, pages still stiff with that new-book smell that faded long ago. A few of them I bought with tremendous excitement, convinced I would start reading that very evening. I did not. And yet, if you asked me whether I regret buying any of them, I would say no without hesitation.

This behavior has a name. The Japanese call it tsundoku, a word that combines “tsunde” (to stack things) with “oku” (to leave for a while). It describes the act of acquiring reading material and letting it pile up without reading it. The word dates back to the Meiji era, which means people have been doing this for well over a century. Probably much longer, in fact. As soon as books became affordable enough for ordinary people to buy them, ordinary people started buying more than they could read.

I want to explore why we do this. It goes deeper than simple consumerism or poor impulse control. When you buy a book you never read, something interesting is happening in your brain, something connected to identity, aspiration, and the peculiar way we humans relate to knowledge itself.

The Aspirational Self on Your Bookshelf

Every unread book on your shelf is a vote for the person you want to become. That copy of War and Peace you picked up in 2019? It says: I am the kind of person who reads Russian literature. The behavioral economics textbook gathering dust near the window? That belongs to Future You, the one who finally understands why markets behave irrationally.

Psychologists have a concept called “possible selves,” first proposed by Hazel Markus and Paula Nurius in the 1980s. We carry around mental images of who we could become, both hoped-for versions and feared versions. These possible selves influence our behavior in profound ways. When you buy a book about meditation, you are not really buying a book. You are purchasing a ticket to a calmer version of yourself. The transaction feels meaningful even if you never board the train.

This is why bookstores feel different from other retail spaces. Walking through one, you are surrounded by possible selves. The travel section whispers about the adventurer you could be. The cooking aisle suggests a version of you who makes homemade pasta on weeknights. The literary fiction shelves promise a more thoughtful, more cultured existence. Each book is a small, affordable piece of an identity upgrade.

Compare this to buying, say, running shoes. Those also represent an aspirational self (the fit, disciplined runner). But running shoes cost more, take up more space, and their unused status is harder to ignore. An unread book blends quietly into a shelf. It still looks like it belongs there. Nobody walking into your apartment will know whether you finished it.

The Comfort of Optionality

There is a second psychological force at work here, and it has to do with options. Behavioral economists talk about “option value,” the benefit we derive from having choices available even when we do not exercise them. An unread book has option value. It sits there, patiently offering itself up for any future evening when you might want it.

I think about this often when I look at my own shelves. The unread books are not dead weight. They are a curated buffer against boredom, against intellectual stagnation, against that particular restlessness that comes when you finish one book and have nothing lined up next. My tsundoku pile is a safety net. Knowing it exists brings a kind of comfort that has nothing to do with actually reading.

This connects to research on the “paradox of choice” by Barry Schwartz, though perhaps not in the way you would expect. Schwartz argued that too many choices can cause paralysis and dissatisfaction. And yes, sometimes I stare at my unread pile and feel overwhelmed about what to pick next. But the solution is never to have fewer books. The solution, for me at least, is to grab whichever one my hand lands on first and commit to fifty pages before deciding.

The option value explains why digital books have not eliminated tsundoku. If anything, e-readers have made it worse. When a Kindle book costs $2.99 on a flash sale, the barrier to purchase essentially disappears. I know people with four hundred unread ebooks. The pile is invisible, which removes even the mild social pressure of a visible stack, but the psychological satisfaction of acquisition remains intact.

The Collector’s Instinct

Some of what drives tsundoku is simply the human instinct to collect. We are gatherers by nature. For most of human history, accumulating resources meant survival. That instinct has not vanished just because we live in cities and order groceries online. It has redirected itself toward objects that carry meaning, and books carry more meaning per square inch than almost anything else you can own.

A book collection tells a story about its owner. I have watched people browse someone else’s bookshelves with the intensity of detectives examining a crime scene. “Oh, you have this one!” they say, pulling out a title and immediately forming opinions. A bookshelf is an autobiography written in other people’s words. It reveals your interests, your intellectual history, your guilty pleasures, your pretensions. The unread books are part of that narrative. They represent chapters of your life that have not happened yet.

Nassim Nicholas Taleb wrote about this in The Black Swan. He described the library of the Italian writer Umberto Eco, which contained thirty thousand volumes. Eco had read only a fraction of them. A visitor might look at those unread books and think, “What a waste.” But Taleb argued the opposite. The unread books, what he called an “antilibrary,” were more valuable than the read ones. They represented the vast territory of what you do not know, a constant reminder of your own ignorance. An antilibrary keeps you humble. It keeps you curious.

I find this idea genuinely useful. When I look at the unread books on my shelves, I do not feel guilt (well, not much). I feel something closer to anticipation. Each one is a door I have not opened yet. The fact that some doors may stay closed forever does not diminish the pleasure of having them available.

The Ritual of Buying

Here is something that does not get discussed enough: the act of buying a book is itself an experience worth having. Walking into a bookstore, browsing the shelves, picking something up, reading the first paragraph, making a decision. That process activates reward circuits in the brain. Dopamine spikes not when you receive the reward, but when you anticipate it. The moment of purchase is the peak of anticipation. Reading the book is the reward, but by then the dopamine has already done its work.

Online book buying triggers similar circuits, though differently. The recommendation algorithms are specifically designed to produce that “yes, I want that” feeling. You see a cover, read a blurb, check the reviews, and within thirty seconds you have clicked “Buy Now.” The book will arrive tomorrow. You will put it on the shelf. You will feel good about this. Whether you ever read it is, neurologically speaking, almost beside the point.

This is not cynicism. I am not saying the reading does not matter. Of course it does. But I think we should be honest about the fact that buying books and reading books are two separate pleasures, each valid in its own way. The book industry somewhat depends on this gap. If people only bought books they actually read, publishers would sell roughly 40% fewer copies. I am making that number up, but I suspect the real figure is not far off.

Social Signaling and Intellectual Identity

We might as well talk about the elephant in the room. Some book buying is performative. People buy books to be seen buying them, or to be seen owning them. The rise of “bookstagram” and BookTok has intensified this. Beautiful stacks of color-coordinated hardcovers arranged on shelves or nightstands. Haul videos where people show off twenty new purchases. The books themselves are almost secondary to the image they project.

I do not want to be too harsh about this, because I think there is value in any culture that makes reading seem attractive and desirable. If a teenager buys a book because a BookTok creator made it look cool, and that teenager actually reads it and discovers a love of fiction, that is a good outcome. The social signaling served a purpose.

But there is a less cheerful side. The pressure to have read certain books, to have opinions about them, to keep up with what is new and talked about, can turn reading from a pleasure into an obligation. And when reading feels like an obligation, buying becomes a substitute. You cannot always find time to read the book, but you can always find time to buy it. The purchase becomes a stand-in for the experience, a way to participate in the conversation without doing the homework.

I see this in myself. When a book generates enormous buzz and everyone in my circles is discussing it, I feel compelled to buy it immediately. Sometimes I read it. Sometimes it joins the pile. The purchase alleviates the anxiety of being left out, even if the reading does not follow.

The Economics of Aspiration

Here is where it gets interesting from a business perspective. Publishers and booksellers have always understood, at least intuitively, that they are selling aspiration as much as content. Think about how books are marketed. A nonfiction title promises to change how you think, transform your habits, revolutionize your approach to work or relationships. The cover design, the endorsement quotes, the subtitle, all of it is engineered to activate the aspirational buyer.

We publish books at ScrollWorks Media, and I will be honest: we think about this. When we were developing Bitcoin for Absolute Beginners by Alexander Hawthorne, we knew the audience included people who wanted to understand cryptocurrency but felt intimidated by it. The book is a genuine, thorough guide. But the act of buying it also signals something: I am the kind of person who takes the initiative to learn about new financial systems. Some buyers will read every page. Some will read the first three chapters. Some will put it on the shelf and feel slightly smarter for owning it. All of those outcomes are fine with us, because in each case, the reader has taken a step toward engaging with an idea that matters.

The same applies to fiction, though the aspiration is different. When someone picks up The Last Archive by Catherine Voss, they are partly buying the experience of the story and partly buying membership in a certain kind of readership. Literary fiction, in particular, carries strong identity signals. Owning it says something. Reading it says something more. But owning it is not nothing.

Is Tsundoku Actually a Problem?

Some people feel genuine distress about their unread piles. Marie Kondo would probably suggest keeping only the books that “spark joy” and donating the rest. Minimalist lifestyle advocates might argue that unread books are clutter, representing deferred decisions rather than intentional choices. And for some people in some circumstances, they would be right. If your unread pile is causing you anxiety, if you feel buried under obligations every time you look at it, then yes, it might be worth thinning the herd.

But I think for most readers, tsundoku is benign. It might even be beneficial. Here is my reasoning.

First, the financial cost is usually modest. Books are one of the cheapest forms of entertainment available. A paperback costs less than a movie ticket. Even if you buy one book a month that you never read, you are spending maybe $15 on a small piece of aspirational pleasure. There are far more expensive and far less enriching habits.

Second, unread books sometimes get read. I have had books sit on my shelf for five years before the right moment arrived. A conversation, a recommendation, a change in my life circumstances, and suddenly the book I bought half a decade ago becomes exactly what I need. If I had followed minimalist advice and donated it, I would have missed that moment. The shelf life of an unread book is effectively infinite. It does not expire. It waits.

Third, as Taleb suggested, an antilibrary is intellectually healthy. It keeps you aware of how much you have yet to learn. In an age where algorithms feed us the same types of content over and over, a diverse pile of unread books is a form of resistance against intellectual narrowing.

The Guilt Problem

Still, the guilt is real for many people, and I do not want to dismiss it. Where does it come from? I think it stems from a cultural narrative that equates book ownership with a promise to read. When someone gives you a book, there is an implicit contract: you will read this. When you buy a book for yourself, you make that contract with yourself. Breaking it, even silently, feels like a small failure.

The solution, I think, is to rewrite the contract. Stop thinking of a book purchase as a commitment to read. Think of it as an investment in possibility. You are not promising to read this book. You are giving yourself the option to read it whenever, if ever, the time is right. The book is a seed. Some seeds germinate. Some do not. A gardener does not feel guilty about every seed that fails to sprout.

This reframing has genuinely helped me. I used to feel a low-grade anxiety about my unread pile, a sense that I was falling behind on some invisible reading schedule. Now I see the pile as a garden of possibilities. Some books I will read this year. Some I will read in ten years. Some I will never read, and they will eventually find their way to a friend or a used bookstore, where they will become someone else’s possibility.

Why the Publishing Industry Should Care

If you work in publishing, understanding tsundoku is not optional. The psychology of aspiration buying directly affects how you market books, design covers, write jacket copy, and price your titles.

Consider pricing. A book priced at $28 hardcover faces a higher aspiration threshold than one priced at $16 paperback. The $28 book needs to promise a bigger identity payoff to justify the expense. This is partly why hardcover nonfiction titles tend to have such ambitious subtitles (“How One Idea Changed Everything,” “The Hidden Forces That Shape Our World”). The subtitle is doing aspiration work, giving the potential buyer a bigger possible self to invest in.

Cover design matters enormously too. A beautiful cover turns a book into an object worth displaying, which adds to its value even if unread. I have seen readers choose between two editions of the same book based purely on which cover would look better on their shelf. This is not vanity. This is the collector’s instinct and social signaling working together, and smart publishers understand it.

At ScrollWorks, we put real thought into the physical presentation of our books. Echoes of Iron by James Whitfield has a cover that holds its own on any shelf, and that matters. A book that looks good unread is a book that gets bought. A book that gets bought has a chance of getting read. And a book that gets read has a chance of changing someone’s mind or heart, which is, after all, the whole point.

The Digital Tsundoku

I mentioned e-readers earlier, but digital tsundoku deserves its own discussion because it operates differently from the physical version. When you accumulate unread ebooks, you lose the visual reminder. There is no stack growing taller on your nightstand. The books exist as a number on a screen, easy to ignore, easy to forget entirely.

This changes the psychology in interesting ways. Physical tsundoku has a self-limiting mechanism: you run out of shelf space. Digital tsundoku has no natural limit. I know one avid reader who has over 1,200 unread ebooks, accumulated over a decade of daily deal purchases. She estimates she will live long enough to read maybe 200 of them. She is fine with this.

The aspiration dynamic works the same way digitally, but the social signaling is diminished. Nobody can see your Kindle library. This means digital tsundoku is purer in some sense; it is about your relationship with yourself, your possible selves, without the performative layer. You buy that ebook about astrophysics for an audience of one: yourself.

There is also the phenomenon of free ebook hoarding. When a book is free, the only cost is the few seconds it takes to download. People accumulate hundreds of free ebooks they will never read. The option value is there, but the aspiration weight is almost zero. It costs nothing to become, hypothetically, a person who reads Romanian poetry.

What Our Unread Books Say About Us

I have come to believe that our unread books reveal as much about us as the ones we have finished. Maybe more. The read books tell you where someone has been. The unread books tell you where they want to go.

Look at your own shelf. What patterns do you see in the unread pile? For me, there is a cluster of books about history, particularly the kind of deeply researched narrative history that I love in theory but find requires more sustained attention than I often have after a long workday. There are several novels by authors I admire but have not gotten to yet. There is a book about woodworking that represents a hobby I have been meaning to start for three years.

Each of these is a thread connecting my present self to a possible future self. The history books connect to the version of me who is more patient, more willing to sit with complex ideas. The novels connect to the version of me who reads more widely, who is better at empathy. The woodworking book connects to the version of me who makes things with his hands. None of these future selves are guaranteed. But having the books on the shelf keeps them alive as possibilities.

This, I think, is the deepest reason we buy books we never read. We are not failing to follow through on a commitment. We are maintaining a relationship with our own potential. The unread book is a form of hope, a small, rectangular, affordable piece of hope that sits quietly on a shelf and waits for us to be ready.

So the next time someone looks at your shelves and says, “Have you actually read all of these?” you can smile and answer honestly. “No,” you can say. “And that is exactly the point.”

The ScrollWorks Media editorial team explores the culture of reading and books. Browse our full catalog to find your next unread treasure, or the one after that.