This book is a must if you have elementary-aged kids who love monsters.I bought this book based on a mention on Poetry Friday and it has been a huge hit with my two monsters (boys, 7 & 11). The rhymes are a joy to read aloud -- the language is funny and sophisticated:"Scientific discipline insists I should stay leeryand not assume the truth is foundwhen what in truth is theory."What really makes the book though, is the complexity and variety of the illustrations: the fold-out letters, the maps, the visual humor. Each spread is unique and rich in detail.