Let’s take a look at that growing stack of books in your room. You know the one: the pile that seems to grow faster than you can read it. It might look like neglect, but it actually says something about your curiosity and hopefulness. Did you know there’s a Japanese word for this? It might just change how you see your book pile from now on.
Enter the world of “tsundoku” (積ん読). This Japanese term describes buying books you intend to read but end up stacking around your home. Unopened, unread and collecting dust—not mistreated, just waiting for the right time.
The history behind the “Tsundoku Sensei”
The word “tsundoku” comes from Japan’s Meiji era, a time when books and reading were becoming more popular. It combines “tsunde-oku,” which means to pile things up and leave them, with “dokusho,” which means “reading books.” The result is a word that perfectly captures an experience every book lover knows well.
The earliest use of the word dates to a Japanese satirical text from 1879, notes bibliographer Mori Senzo. It described a teacher whose shelves were packed with unread books. The word was a gentle joke, carrying no malice—a connotation that remains today. Professor Andrew Gerstle adds that “tsundoku” still carries no stigma in Japan.
Tsundoku vs. Bibliomania: A meaningful distinction
Both “tsundoku” and “bibliomania” involve collecting books, but the reasons behind them are different.
“Bibliomania” describes an excessive obsession with collecting books, often for their rarity, beauty, or the pleasure of owning them rather than for reading. A bibliomaniac focuses on obtaining desirable volumes—such as first editions or illustrated works—valuing the collection itself above the books’ contents.
“Tsundoku,” on the other hand, is about wanting to read the books you buy, even if you haven’t gotten to them yet. Maybe you picked up a book because a friend recommended it or because something new caught your eye. The stack grows not out of obsession but out of the hope that you’ll read them all someday.
That difference matters. A “tsundoku” pile isn’t just a collection; it’s a sign of your curiosity and your goals. It shows not only who you are but who you want to be.
Your brain on “tsundoku“
So why do we keep buying books when we have a pile of them we haven’t read yet? The answer has a lot to do with how our brains work.
Buying a new book triggers a dopamine release, the same neurochemical associated with anticipation. The pleasure hits the moment your credit card is swiped. Reading can wait, but “later” often never comes.
Your unread books are like little promises to yourself. They represent the “aspirational self.” Each one is a version of you who has finally read Anna Karenina, finished The Secret Lives of Color, or learned something new from The Trauma of Everyday Life. That future self feels close, just waiting for you to catch up. So the pile grows, full of hope and possibility.
There’s nothing wrong with wanting to learn more, even if your curiosity sometimes outpaces your reading speed. The desire for new ideas is a good thing.
The “antilibrary” concept
Italian novelist and philosopher Umberto Eco practiced a more extreme version of this habit. His personal library contained more than 30,000 books, most of which he hadn’t read. Eco celebrated it. He referred to his collection of unread books as an “antilibrary”—a clear reminder of all the knowledge he had yet to discover.
Nassim Nicholas Taleb, author of The Black Swan, expanded on Eco’s idea of an antilibrary. He argued that you should maximize your library’s space by keeping books on topics you know little about. “Let us call this collection of unread books an antilibrary,” he says.
An antilibrary is a “memento sciendi”—a representation of all you have yet to learn. Rather than a failure, a shelf of unread books signals intellectual humility: “I know what I don’t know and want to learn more.”
“Tsundoku” meets the modern world
“Tsundoku” is now found far from Japan. The idea lives on in gaming culture, where players build libraries of unplayed games on platforms like Steam—sometimes dubbed “Steamdoku.” As cartoonist Ronnie Filyaw put it, “Tsundoku is collecting books you won’t read. Steamdoku is your Steam library.”
Then there’s BookTok, TikTok’s beloved part of the Internet dedicated to all things literary. On BookTok, reading is a shared social experience. Creators turn the act of collecting books into engaging content, often filming their towering “to-be-read” (TBR) piles. Here, an unread stack becomes a form of individual expression and a way to connect with fellow book lovers.
This digital domain has had a remarkable impact on the publishing world. NPD BookScan reports that a group of writers rule BookTok and have enjoyed lucrative rewards: 80 authors with large BookTok followings saw their collective sales more than double in one year, rising from nine million copies in 2020 to 20 million in 2021.
The irony, of course, is that the gap between books bought and books read may be wider than ever. Despite the boom in book buying, reading is on the decline. A survey from the National Endowment for the Arts found that only 48.5% of American adults read at least one book in 2022. That’s a noticeable drop from 52.7% in 2017 and 54.6% in 2012. The numbers for fiction are even more stark, with just 37.6% of adults reading a novel in 2022—the lowest rate in the survey’s 30-year history.
“Tsundoku” lives in the space between wanting to read and actually finding the time to do it. Life gets busy, but the desire to read and keep learning is always there. Your bookshelf is waiting, ready for you to choose a book and begin.
Embracing “tsundoku” as an act of optimism
Remember, every unread book on your shelf is a promise to your future self. Each perfect, unbent spine represents an inquisitiveness that hasn’t found its moment yet.
At its core, “tsundoku” is about optimism. Every new book you buy shows you believe there will be time for new ideas. The world is full of stories, and there’s always more to learn.
So the next time someone questions your growing stack of books, remember: there’s a name for your habit. Book lovers in Japan have used it for over a century. You’re not alone in believing that, one day, those books will be read.
And if some books stay unread? That’s okay. The pile is still proof of your curiosity and your commitment to keep growing. “Tsundoku” is a sign of hope and the drive to learn, not a sign of failure.
