Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good for a brush-up

I hadn't worked in CSS in several years and my skills were beyond rusty. The book doesn't give you any particularly advanced skills, but if you're looking for a refresher, you could do worse.I would imagine it would work well for most people new to this as well, but it's hard sometimes to know how much previous knowledge you're bringing with you.