Like the other books of the Schaum's Outline series, this book goes through the theories and shows you how to work the problems step by step. Although this is very helpful, I like to be able to test my knowledge. I say this is good for review because you will remember as you read this. You will also have a good idea of whether you are doing the supplementary problems correct or not. Here, most the supplementary problems do not have answers. Those that do, just have the final answer rather than an illustration of how the writers got the answer. This is difficult if you are learning about real variables for the first time.