If you are in any way interested in betting on greyhound racing then this book is a must read. It is by far the best book of it's kind. The book was written in the 1970's and as such is a little outdated in the tracks and types of racing surfaces mentioned. (This outdated information is, however, interesting from an historical point of view).
On the plus side, the authors insight into greyhound racing is beyond parallel and I would implore you to get a copy if you can. I know that this book is in limited supply so if you get the opportunity take it.
As with most books on betting none ever seem to be truly complete but the author has addressed many important issues.
I also recommend Greyhound Racing To Win by Victor Knight (another English book) and Winners Guide to Greyhound Racing by Prof Jones