Don't know if anyone else has seen this but Bob Henrit author of the 'Complete Simmons Drum Book' says he has a revamped version waiting to be published.
Good news for those who don't own the original edition and baulk at the outrageous prices of used copies.
Third post from the bottom.
http://www.mikedolbear.com/forum/topic.asp?TOPIC_ID=113853