Occasionally, there will be a book that looks at speed handicapping, but these publications will only look at speed in a manner that is plain to see in the past performances and not what elements go into producing this speed.
Although the author uses class as his starting point, he takes a long look at other factors in quarter horse handicapping as well. After reading this book, you will not be overly focused on a quarter horse's final times and speed ratings.
Here is the list of the topics covered
Class
Condition
Recency
Call
Speed
Trainer
Jockey
Weight
Age
Tote Board
Maidens
Minor Factors of Handicapping
Money Management
The Complete Quarter Horse Handicapping Method
This book was originally published in 1983. Although out of print for more than 20 years, it is now back in print from Teela Books publishing.