Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not that easy

I picked up Algebra: The Easy Way to refresh my math skills to prepare for a math placement test for college. As others have mentioned, the book attempts to teach you with a fantasy type story where the characters learn algebra along their adventure. I didn't mind this way of learning but the teaching is so lacking and at times completely confusing. My biggest complaint was that many of the practice problems at the end of the chapter were unreasonably hard and required knowledge that wasn't even covered in the book. I picked up Elementary and Intermediate Algebra by Angel which is a real college textbook being sold for incredibly cheap--it's a great text I recommend.