Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Did anyone proof-read this thing?

This book is a mess. It is rife with typos and confusing grammatical errors. Diagrams are cut off and/or poorly laid out.This would be forgivable if the overall content hit the spot. However, as another reviewer noted, the main focus is on the internals of JBoss, not on how to use it. Ultimately, that's the biggest disappointment.