As an answer I’m giving you a definition or a wide description from the blog of the Smithsonian library:
“But what, exactly, is an artist’s book? You may not be able to tell just from looking at the object itself!
The simple answer to someone not familiar with artists’ books might be:
art in book form. But they are not quite so simple…
An artist’s book is a medium of artistic expression that uses the form or function of “book” as inspiration….
What truly makes an artist’s book is the artist’s intent, and artists have used the book as inspiration in a myriad of ways and techniques, from traditional to the experimental. The book could be made through fine press printing or hand-crafted, the pages illustrated with computer-generated images or cheap photocopies; books became sculptures, tiny and gargantuan; books were sliced up and reconfigured, made from all kinds of materials with unconventional objects incorporated, in unique or limited editions, or produced in multiple copies. With all sorts of ideas behind them, artists continue to challenge the idea, content and structure of the traditional book.
https://blog.library.si.edu/blog/2012/06/01/what-is-an-artists-book/

Check as well this link from the British Library: https://www.britishmuseum.org/blog/enter-intriguing-world-artists-books

And do a search online around the theme of "artist book", you won't regret entering the very creative world of artist book makers.