For Diabetes--Dr. Berstein's Diabetes Solution is a comprehensive reference. Best thing I've come across on the subject.
Good book here New Book on Hypothyroidism and Hashimoto's by Datis Kharrazian, DHSc, DC, MS. I've read it a couple times . Lots of good info.
This is another good one and good site Thyroid Mistreatment, Hypothyroidism Scandals, and Thyroid Treatment Problems | Stop The Thyroid Madness