This book is super-fun.
The internet is being deceptive in displaying this book, because it's actually just over a foot wide. And then you turn it on its side and our Heroic Scientific Protagonist travels down into the center of the earth, encountering math and miscellaneous monsters and also some of the best skeletons as he goes.
You may have seen the mini-comic version of this, but now it's a book with an ISBN and a colorful paper-over-board cover and everything! This is the most fun you'll have with science this month.
Jon Chad is one of the instructors at CCS; if you don't know him, he is also super-fun. You can find more about him (and about this book) here.