The following is from my review of North! Or Be Eaten posted on my personal blog:

This second book is a treat, even better than the first, but I highly recommend reading them in order. You'll better understand why and from what the Igibys are running, and you'll further be prepared to expect the random bits of humor in the story, the personalities of the main characters, and the footnotes on various pages in the book. Speaking of humor... this book is spot on! I love Andrew's wit and feel he's really improved since the last book at incorporating it more neatly into the story. I laughed out loud several times, especially when I read about Podo Helmer "quivering in a boat like a belcher's belly" and Janner Igiby being disturbed by the superfluous punctuation of the "FORK! FACTORY!" as he was about to be imprisoned in it.