The book's back cover touts that the book contains ratings for close to 9,000 album and 935 musicianbiographies. Artists are set up alphabetically and include some of the following: birth and death dates, classification (vocals, guitar, drums, etc.), a biography, a discography. The discography listings include a five star rating, the music label it was released on, and the date as well as possibly reviews of certain albums.
All Music Guide to the Blues: The Definitive Guide to the Blues also includes 30 essays covering different styles of blues, along with "top lists" and extensive charts on the evolution and lineage of the blues.