Funny that you mentioned Vanilla Fudge. Their first album was maybe the greatest collections of covers ever made. Then Bogert and Appice teamed up with Jeff Beck to make a land mark album that I think was one of the real greats even though it isn’t remembered by many.
Three years ago I teamed up with Mark Stein of VF to write his bio/a history of rock in the golden age. We could. Not find a publisher, but Mark has it. On his web site, www.mark-stein.com. It is IMHO a very good book. It has all of the details of the albums, the breakup, Cactus, Boomerang, and Beck Bogert Appice.