If your looking for a good contact book with excellent references the Sourcebook is a mixup. Contacts are always hard to get a hold of the music industry as positions and people are always changing. This reference book comes to you in great detail and is probably on of the thickest and most resourceful contact books I've seen to date. If your looking for a good contact list I reccomend the musicians atlas with the current year. No sourcebook has 100% accurate information but 2005 you can expect about 85% of the info in this booklet to be nonusable now. The Musicians Atlas I had from 2008 is about 70% non usable now. As most phone numbers, addresses, and persons of contact no longer apply. If there is ever a 2010 version of this booklet (still searching) it would be worth picking up... however these booklets are only good for about year or two before you find out you need to refresh of the phone numbers.