Aha! Gotcha is filled with very different types of puzzles than aha! Insight, which has many problems to solve. This book just presents many fun paradoxes that make you use your head, and while some of them are problems you have to take some time to solve, most are short paradoxical situations that you can think about for a short while and then go on the next page. It is easy to read, and Gardner again shows his skill in explaining interesting phenomena in a clear and interesting way. All the problems are good exercises on logical thinking and introduces various concepts of mathematics and statistics without seeming like you're studying.
Martin Gardner is truly unique in his ability to take a difficult mathematical concept and make it understandable. During his decades as the author of a regular mathematical column in Scientific American, he has done more to advance the progress of mathematics and science than anyone else in history. By turning so many young people on to mathematics, he is one of the intellectual grandfathers of hundreds of thousands of people.