Quote Originally Posted by GreyWolf
Does anybody know of another book that I might purchase that would approach explaining BTZS instead of the Phil Davis book?

Kind Regards,
Take a look too at Way beyond Monochrome http://www.darkroomagic.com/bookInfo/bookInfo_new.htm. Not exactly the BTZS, but just as good, a lot of additional information, and a lot easier to read than BTZS.