Take Charge of Your Diabetes 2007 book with lots of vitamin D information

http://www.amazon.com/Take-Charge-Your-Diabetes-Revolutionary/dp/B00394DG2S/ref=sr11?ie=UTF8&s;=books&qid;=1269877515&sr;=8-1

Sarfraz Zaidi MD later wrote excellent book just on Vitamin D

http://www.amazon.com/Power-Vitamin-Comprehensive-Information-Deficiency/dp/1432748106/ref=sr11?s=books&ie;=UTF8&qid;=1280681185&sr;=1-1

which is reviewed on the vitamin D wiki - PDF from author is just $5