I fully agree with Harley Payette's statement which is posted here on [...]: "This is without a doubt the best rock reference book around today" and they add "however, it does not quite live up to the standard of the original 1995 edition which was simply the best rock reference book ever."
This is dead right (well, except my previous edition was dated 1997 and not 1995 but let's not quibble!). In this new edition the write-ups for each group have been cut right down and are far, far shorter than in the previous edition. Also some of the breathtaking excellent essays have been dropped. For example compare the entries for Nirvana: 20 column inches in 1997 have been reduced to less than three column inches!
Fortunately the All Music website provides access to most of this missing data but I would really like to have it in book form.
Yes, this is still the best rock reference around but sadly it is not as good as it used to be. It is drifting worryingly towards the format of the MusicHound book on Rock (which, if you don't know it, is another rock reference guide).
I guess the best way to fill the hole which is now appearing in the All Music book is to get the Rough Guide to Rock. The Rough Guide was always a bit idiosyncratic as a lot of its entries were written by fans of the groups involved (but they were not always sickeningly sweet in their statements!) but the Rough Guide always gave a far more immediate sense of the passions and emotions of what the band was all about, whereas the All Music guide confined its remarks to the strictly factual and it always seemed to write as if the All Music guide was thinking about the band's lawyers suing it!
Just to complete the comparison of the All Music guide to other similar volumes, there is the Virgin Encyclopedia of Popular Music. Despite its high price the Virgin book really doesn't stand up to any of the guides I have mentioned. It is not worth considering.
So buy this All Music guide. It still is the best. But the best just got worse. Maybe buy the former edition (1997, second edition) instead to make sure you get all the band info. In fact, I could see a case for buying the former edition in preference to this latest edition if your real interest is not on album reviews but on background to bands!