Justin Lo

First and foremost, there are lots of mistakes in this book. If you have the book, some of the many mistakes it contains include Q575 which the answer should be 30 instead of 31, and Q574 which the n in 1/n should be 3 instead of 5. Other than the mistakes, it is quite a comprehensive book, but the resources are outdated. I recommend getting other guides and practice exercises instead of this.