My dad had two of Gardner's books. I loved puzzling over them as a kid - enough that I bought my own copies for my kids to discover. I credit those books with m

My dad had two of Gardner's books. I loved puzzling over them as a kid - enough that I bought my own copies for my kids to discover. I credit those books with much of my interest in logic. Gardner's puzzles always had a beautiful simplicity to them. The solutions are sometimes fiendishly hard, but the problem is always accessible to the layman - no great grasp of mathematics is needed, just the ability to think logically and rigorously. http://www.amazon.com/Mathematical-Logic-Puzzles-Dover-Recreational/dp/0486281523/ http://www.amazon.com/Mathematical-Logic-Puzzles-Dover-Recre... http://www.amazon.com/Entertaining-Mathematical-Puzzles-Martin-Gardner/dp/0486252116/ http://www.amazon.com/Entertaining-Mathematical-Puzzles-Mart...