First Step To Mathematical Olympiad Problems, A Illustrated Edition

My son who is in 9th grade is able to understand it well.A systematic&creative way to learn olympiad type of problems and a good way to start with.

The book is very good if you are new to the mathematical way of thinking of problems and solving them. The book contains many good problems, some hard, some easy, in order to prepare for math competitions. However, the number theory section is extremely easy, so if you are looking to prepare for number theory problems on IMO-level, you might want to pick up another book as well. The solutions to some problems in the book are not written down, so on some of the problems which you are unable to prove, the Solution section offers no help. Instead, the author has chosen to try to be funny, which ends in a fail if you are really looking to plow through the book picking up knowledge.For those of you who have already bought the book: The first chapter may seem very hard at first, but don't worry, it is not representative for the level the rest of the chapters are on. The geometry was hard, but don't worry if you find the first chapter hard, just take your time and work through it to give yourself a good foundation to work on.All in all it is a good book, but I only give it 4 stars for the reasons explained over, however, I don't know of any books which are better for you if you are just starting. Titu Andrescuu's books are a little harder, and you might want to start with this one then change over to Andrescuu's books.