...by Dave Hunter:

http://www.amazon.com/gp/product/087...ref=pe_snp_318

Not released yet, but probably will be worth having. If it is like any of this other books, it is a good reference tool.

His book for beginners on amps is stellar:

http://www.amazon.com/Guitar-Amp-Han...sr_1_1?ie=UTF8

tung