Gregor and the Prophecy of Bane (The Underland Chronicles, Book 2) - Suzanne  Collins
First off, I'd just like to say that I enjoyed this book much more than the first! Despite the numerous literary cliches (even in dramatic parts) and some shaky writing, this book was very gripping. It was hard to put it down; definitely a page-turner. It also succeeds by making me want to read the next installment, which I plan to do very soon.