The Art and Craft of Problem Solving
From AoPSWiki
The Art and Craft of Problem Solving by Paul Zeitz, former coach of the U.S. IMO team, is generally thought of as a good mathematical book for when one is finished with the Art of Problem Solving.
| Preparing for MATHCOUNTS or the AMC contests, and having a tough time with number theory problems? Read Art of Problem Solving's Introduction to Number Theory by Mathew Crawford. |
The Art and Craft of Problem Solving by Paul Zeitz, former coach of the U.S. IMO team, is generally thought of as a good mathematical book for when one is finished with the Art of Problem Solving.

