Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Decent overview of many algorithms

This book is more about breadth than depth. It explains the workings of pretty much every data and image compression algorithm you've ever heard of. It's not as strong on theory as Bell/Cleary/Witten's _Text Compression_, and doesn't have source code like Nelson's _The Data Compression Book_, but it does a fine job of filling in the space between.If you're not looking for source code or lots of theory, and just want to know what all these dozens of algorithms actually *do*, this would be an appropriate book for you.