This is the third edition of the one of the founding titles of the CHLT series. The book features many of the original games but has also been fully revised to include new games for the ELT classroom.
The structure of the book has also been revised so that the games are now grouped in a more teacher-friendly format where teachers can search based on language and skill criteria rather than just game type.
Andrew Wright is an author, illustrator, teacher trainer and storyteller and has worked extensively with both teachers and students all over the world for many years. He loves creating things, doing practical things and working with and for people; he believes that language teaching allows him to do and be just that.
This entire series is great for finding new activities to liven up your class. I love these books, but let's be clear that what they provide is a group of tactics, not the big picture strategy needed to win the war but rather the battlefield tactics necessary to make a specific lesson more engaging. Don't expect discussion of assessment, these are just games.
Search for Cambridge Handbook for Language Teachers to see the whole series, there are maybe 20 or 30 titles.
If you are just building a professional library I would NOT start with these books. Start with something like Omaggio's book (hopefully I'll remember to add the full citation here when I get back to school... those books I still keep near my desk to peruse during prep periods). Omaggio gives you a better understanding of the process of building all language skills through a well-designed program, and how to intelligently build such a program taking into account the needs of your specific students.