If you are working alone to improve your logic skills or prepare for a test in connection with a job or school, you will probably want to use this book in combination with its companion text, Reasoning Skills Success in 20 Minutes a Day, 2nd Edition, or with some other basic reasoning skills text. If you’re fairly sure of your basic logic and reasoning abilities, however, you can use 501 Challenging Logic and Reasoning Problems by itself. Use the answer key at the end of the book not only to find out if you got the right answer, but also to learn how to tackle similar kinds of questions next time. Every answer is explained. Make sure you understand the explanations—usually by going back to the questions—before moving on to the next set.
It is a very nice book. I enjoyed most of the sets. It is an introductory guide for IQ and logic simple challenges. The problems are not hard at all, however some problems rely mainly on strange English vocabulary which are not familiar. These sets were really irritating.
The small book was finished by me in just a day. The book doesn't stand anywhere taking a look into today's competition. The book is good if a person wants to develop his understanding for English comprehension. Analogy: 8/10 Content: 3/10 Easiness: 9/10 Concept: 6/10