Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Huge amount of material, complete study reference

I just got my copy of the CISSP Prep Guide 2nd Edition this week and have several other CISSP books. This book is huge, and is the most comprehensive collection of study material of any of them. It's the most up-to-date, and is very accessibly written. Clearly the best value and most complete CISSP study text available.