Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Go for this one

As a total beginner I choosed this book with the help of a japanese friend. Right from the start you can understand the principles of this language, it gives good explanation on how to write (although it's not the main objective of this book) and speak japanese. Absolutely fantastic. I'm about to finish reading the book for the 1st time and I will go through some parts of it again. I reccommend it. Worth the bucks spent on it.