Sit on lit.
Here’s a cardboard stool made to appear like a stack of books. It can carry up to 200 kg. It is not actually made of books.
My late friend Ruthie—whose birthday was yesterday, spooky coincidence—once tried to build a bed out of books. She arranged them into stacks and put a door on top. It can’t have been very comfortable; fortunately the discomfort didn’t last as the “bed” kept falling down. The solution would’ve been to glue the books together, but then she wouldn’t be able to read them.