Wow, thanks for the praise! I hadn't heard of The Anatomy Coloring Book before and it looks/sounds a lot like what I have in mind for this book. Thanks a lot for mentioning it. Also, I think you nailed it with "the coloring is mostly a way to engage with the visual material in a physical way, which aids recall."

If you have any suggestions for improvements or content feel to let me know. And I'm always looking for "beta" testers of the book =)