My first time using Alibris was a disappointment. The seller wanted a lot of money for the textbook and then wanted to run my credit card again because he didn't calculate the shipping charges correctly. I tried with a different seller, Marie. Not only was my textbook better priced but it arrived in excellent condition and right on time for my class! What she advertised was what I paid, no surprises. I would order again with Marie. I like paying only once for a book. The textbook offers answers but not all with breakdown explanations. It is great for checking even-numbered questions.