Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A good book for beginners

I got this book my freshman year in college, and it seemed as a bit complicated, but when I re-read it my junior year I realized that there were a lot of oversimplifications...It is a good book to start with---it explains ideas very well with out too much fuss.However, if you already have a BS in biology or related field you might be better off looking for something more advanced.