Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Must for the OS X User

Get this book and the "Missing Manual" from Pogue, and you will be in total control of your OS X Mac. This book has anwers for either the "regular" user and developers as well. I have tried about 80% of the "hacks" and they work as it is indicated on the book. You can start on any section of the book and you won't be lost. I hope they keep this publication up-to-date.