I have read his other book,
The Rock and Roll Rebellion.
That books covers a wide range of artists/bands with a spiritual view:
Johnny Cash, Bob Dylan, Alice Cooper, U2, Gary Cherone, Lenny Kravitz, MxPx,
and others.
His site is updated almost daily with news on these artists/bands and others:
http://www.rockrebel.com/
The page today has news on Scott Stapp and
The Passion of The Christ project he is working on.
Two other books on the subject:
Walk On, The Spiritual Journey of U2 / Steve Stockman
Restless Pilgrim, The Spiritual Journey of Bob Dylan /Scott Marshall
I'm looking forward to reading Mark Joseph's new book.