Raven Kaldera's book Hermaphrodeities is the best transgender spirituality workbook I've ever come across. It's also the only transgender spirituality workbook I've come across, but that in no way lessens its greatness. I am impressed. I want very much to get together a transgender-genderqueer-genderflexible esoteric spirituality group at some point. Maybe I'll find one in SF; everything else is there.