I didn't buy this book (thank god) but got it out from my University library to do a bit of a refresher on GT for "fun". Firstly it's only about 100 pages of sparse text and clearly not worth $60. Secondly the first 3 chapters make very little sense and have terribly confusing questions (and no answers) that will turn you off before you get to later on in the book. And on top of that there are mistakes in a number of the calculations (check table 5.2 if you were silly enough to buy it). Get carter instead, it's the same price and is actually a really decent book.