I know it's a simple irritation, and probably not worth a separate topic, but I didn't find anywhere I could add it, so here goes:
When you start a new book, the progress is shown in a box on top of all the information about materials used for the first two kinds of books. Why? That's really annoying! I can't remember all the materials needed, and since I'm always creating some book, the information is almost never available for viewing. There's more than enough space at the bottom of the Bookbinder interface, to put a progressbar and the name of the book currently under production. No need for an extra window. The functionality for disabling the buttons used to start books is already in place and being used (when the materials aren't available). Why not just use that, to block us from trying to start another book?