2) Don Saliers' discussion of how music and theology impact each other. Not a long book, but good concepts to have in mind when considering music for worship.
3) I don't agree with everything in this book. He acts like he appreciates all forms of music worship, but there is a definite slant toward classical music and traditional worship music. What it does do well is a bring up the issue of pastoral musicianship; how church musicians should be trained and how clergy can help.