Charles Ashbacher is a passionate problem solver with over one thousand journal problem solutions to his credit. He is also the author of five books, an editor of Journal of Recreational Mathematics, a part-time college professor and president/CEO of Charles Ashbacher Technologies, a company specializing in state of the art computer training. 

Some of his books can be downloaded from http://www.gallup.unm.edu/~smarandache/eBooks-otherformats.htm