No explaining required: the object is its own label. It's the one folded book where the choice of book isn't arbitrary — and second-hand copies of the thick ones cost almost nothing.
Most folded books need a book that's thick, cheap and disposable, and the title on the spine is beside the point — you'd fold LOVE into whatever was going spare. Fold a title into its own book and that changes: the cover, the spine and the pattern all say the same thing, and someone who loves the novel gets an object made out of it.
It also solves the usual sourcing problem. Bestselling hardbacks are the cheapest books in any charity shop precisely because everyone owned one, and they're exactly the 400–600 pages a folded title needs.
A title has to clear two bars at once: short enough to fold, and printed thick enough to fold it into. Plenty of great titles fail the first.
Seven letters, and the hardback runs past 450 pages — the title and the book agree on size, which almost never happens.
Four letters and every edition is thick. The easiest literary fold there is.
Digits are narrower than letters, so this needs less book than its four characters suggest.
Works twice over: a novel and a name. The most-given of these as a birthday present.
Two letters into a 1000-page paperback — comically oversized, which is the joke.
Seven letters. Collected-works volumes are thick enough; a single-play edition is not.
Fold the memorable word, not the title
GATSBY, not THE GREAT GATSBY. MOCKINGBIRD, not TO KILL A MOCKINGBIRD. Anyone who knows the book gets it instantly, and you've halved the width.
Use the author instead
AUSTEN, ORWELL, TOLKIEN. Often shorter than the title and works across a whole shelf rather than one novel.
Split across two books
A matched pair from the same series — one word each. This is the only way to fold a genuinely long title, and it looks deliberate rather than like a compromise.
Fold a symbol from the book
A ring for Tolkien, a mockingbird, a lightning bolt. If the shape is hollow or outlined, the generator will tell you and offer Cut & Fold.
Buy a second copy, not theirs
Never fold a reader's own book, however battered. The whole point of the gift is that you understood what the book meant to them.
Charity shops beat online
You need to check the page count and the paper, and neither shows in a listing. Book-club hardbacks of bestsellers are usually under a couple of pounds.
Avoid glossy paper
Popular non-fiction often has coated stock that won't hold a crease and springs back open. Plain uncoated novel paper folds far better.
Keep the dust jacket
Fold the book, then slip the jacket back on when it's displayed. The cover art next to the folded title is most of the effect.
Selling these? A title or an author's name is a trademark in many cases, and cover art is copyrighted. Folding one for a friend is fine; listing them for sale is a different question, and not one to take from us.