JJ, I think you'd like this book cause you love puzzles. It is filled with mental type puzzles and exercises that really make you think. Some are easier than others, some are real ball busters. These exercises are suppose to LOWER your brains age to when it was young, not at all fuzzy in our thinking or foregetful... It works.
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Take a peek at my BLOG:

http://charleen-micheles.blogspot.com/