This book is a collection of printed Wikipedia output on every type of game element and cross category of gaming. There are no original author thoughts or any how-to advice; in fact all the content was taken directly from the Internet (properly cited). The collection is semi-interesting in that it highlights all of the gaming concepts in once place.
The book was not what I expected from the Gamification Handbook. There is a more updated reference tool out there as well and it is free: wikipedia.org. The reader is advised on the opening page..."Nothing found here has necessarily been reviewed by people with the expertise required to provide you with complete, accurate or reliable information." With that said, even the author\curator begs you to think twice about this one.