This book contains 21 different kinds of puzzles and 525 puzzles in all. The description and number of each puzzle is in the table of contents inside the book. A few corrections had to be made and they, along with 4 free puzzles, can be found here: http: //www.freeenergyandhealth.com/Freebies.pdf which is one of my websites. The Criss-Cross puzzle came out too faint in print, but you can get it here: http: //www.freeenergyandhealth.com/CC.pdf. The answer sheet came out fine in the printed copy of the book. Also, 3 or 4 samples can be found here: http: //www.freeenergyandhealth.com/Book1.html. I started the first 23 puzzles of this book over 40 years ago and created some types of puzzles you might not have seen before. This book also contains many you have probably seen such as cryptograms and word searches. I am currently working on another puzzle book which is almost complete and has some puzzles not in the first one such as Sudoku and math squares. When it comes out is dependent upon my finding a publisher that has better printing capabilities.