This is a clever, literally slim book, designed as skinny as possible in order to highlight its central conceit. You see, the running gag here is that you have to turn the book sideways to follow Leo on his downward trek to the Earth’s core, and then turn it another 180 degrees as he heads back up.
The book combines science with fantasy, with Leo discovering lost worlds filled with crazy monsters while spouting out science facts like “Some countries like New Zealand and Iceland harness the awesome power of lava for their own uses in heating and generating electricity. Though the juxtaposition of fantasy and hard facts seems a bit jarring, it actually adds to the book’s charm. There’s something about a guy standing on a giant underground ogre while discussing thermal generators that’s too silly to dislike.
Though Leo himself is one step up from a stick figure, Chad fills the pages with as much detail as possible and his ornate underworld scenes take on a “Where’s Waldo”-like mania at times, especially as he eschews panel borders to instead depict various versions of Leo crawling across a wide (but narrow) vista. Basically, it’s a fun introduction to geology that the elementary-school set will really dig (sorry, couldn’t help the pun).