All Music Guide ....

All Music Guide to Jazz is a non-fiction book that is an encyclopedic referencing of jazz music compiled under the direction of All Media Guide. The first edition, All Music Guide to Jazz: the Best CDs, Albums & Tapes, appeared in 1994 and was edited by Ron Wynn with Michael Erlewine and Vladimir Bogdanov (head of the All Music Guide book series).[1] The book's fourth edition was released on November 27, 2002 and was edited by Vladimir Bogdanov, Chris Woodstra and Stephen Thomas Erlewine.

Content

The book's back cover touts that the book contains ratings for close to 20,000 albums and 1,700 musician biographies. Artists are listed 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. These reviews are done by "respected critics" from Jazz Times and Coda.[2]
There are also thirty essays on different styles along with "top lists" and extensive charts on the evolution/lineage of the jazz.

Read more: http://en.wikipedia.org/wiki/All_Music_Guide_to_Jazz