"From Fatigued to Fantastic" by Teitelbaum - draws together the issues surrounding CFS (thyroid, adrenals, allergies, MCS, candida, etc.), explains bloodwork, especially adrenals well
Sherry Rogers, MD - anything by her is worth reading, holistic approach to CFS, MCS, etc.
"What Your Doctor May Not Tell You about Menopause" by Lee - women's hormones, favors progesterone supplementation, also his premenopause book is excellent
"Screaming to be Heard" by Elizabeth Vliet - extensive, detailed information on women's hormones, more favors estrogen supplementation
more books coming!