From the elementary puzzles to Olympiad-level stumpers, the problems in these books will challenge your best students. I enjoy working through these myself!

**Running a Math Circle**

Explore math puzzles in a cooperative group environment.**Elementary Problem Solving**

Give your children a great start in math with these “How to figure things out” books.**Intermediate Problem Solving**

Middle school and high school topics, puzzles, and activities.**Advanced Problem Solving**

For high school and beyond, including recreational math.

Within each subcategory, books are listed alphabetically by author.

If you click on a book cover, the links take you to Amazon.com, where you can read reviews and other details (and where I earn a few cents of affiliate commission if you actually buy the book), but most of these books should be available through your public library. Ask a librarian to find you a copy — they love to help!