While this is primarily a suggestion for cookbooks, I could see the functionality extended to regular books as well, especially ones that end up being much longer.
I'd love a table of contents page to be able to easily find a specific recipe, especially since even a single simple recipe takes up a whole page, which can end up making the cookbook pretty lengthy. Additionally, a "return to first page" (or "return to table of contents") option would also be really helpful!
We will probably add a "flip to front/back" option when we have an actual finalized UI for books (instead of the placeholder one I made).
Table of contents is iffier. Especially for cookbooks, bear in mind this is something you are adding and removing pages to. It makes little sense for it to magically have a table of contents. I think our expectation is that if you have too many recipes for one book, you start separating them out into multiple cookbooks, and maybe keep a bookcase with them and pull them based on what you're cooking that day.
