Just read this blog post from Book Creator about a whole new host of comic book features in Book Creator and tried them out for myself. Here's a page of my efforts, which I made in less than 5 mnutes:
It was very easy and intuitive to use, especially after watching the introductory video. I discovered that you can't mix a traditional book and a comic book - you need to choose the comic book feature when you first start a new book in order to have access to all the comic features. The Book Creator app on your iPad should have updated to the new version - if not, see me or check in with Maggie. Let me know if and how you use these new features - I think the students will love them!