Red Dos-a-Dos Book by A. Fain Books. When I first heard of this book form, I thought it was named after the do-si-do dance step. It turns out I wasn’t too far off: do-si-do (or dosado) is a corruption of the French dos-à-dos, which means “back-to-back.”

Everything Falls into Place, from Purgatory Pie Press. A pamphlet-style dos-a-dos booklet.

Winter constellation book, an accordion book by Chiaki Mori, not unlike a series of dos-a-dos books put together. Not to be confused with this kind of accordion book!

Coptic, exposed-binding sketchbooks by unknown artist, found via poppytalk.

New sketchbook, a Western codex style book by Gregory Lee.

Concertina book by littlepaperbird. If you’ve seen both an accordion and a concertina, you could be forgiven for wondering why both have book forms named after them, when the concertina book has a lot in common with the shape of either instrument and the accordion book, not so much. Here’s all I can come up with: concertina books look like concertina books, and accordion books… go back and forth?

An altered / sculptural book by Boukje Voet. See more altered books on the altered books tag, and more sculptural books on the sculptural books tag.

Remnant in Time, a tunnel book by Mary Beth Boone. Tunnel books are difficult to photograph, but I tried to pick a shot of this that shows the concertina form of this book, as well as the multiple cut-outs that create the diorama-like scene that defines tunnel books.

Bobbins by Diane Savona. I love these bobbins, which are a great example of the many forms a book can take. Scrolls, messages in bottles, sculptural art objects, concertinas with unturnable pages, tunnels showing diorama-like scenes, containers for novels or text or images, and of course, the screens of computers and devices. And those are just the ones I can think of off the top of my head!