I had gestational diabetes years ago, so I already had a hint that I might develop type 2 diabetes at some point. Last year, after years of being pre-diabetic, I finally did. I'm taking the meds (no insulin at this point, thankfully) but also trying to reverse it.
Note: They say that once you're diagnosed as diabetic, you're always considered diabetic. However, it is sometimes possible to get your blood sugar within normal range where you have no signs of diabetes, which would be good enough for me!
A couple of books I've found helpful, whether for pre-diabetes or full blown diabetes are:
Dr. Neal Barnard's Program for Reversing Diabetes: The Scientifically Proven System for Reversing Diabetes Without Drugs.
And
The End of Diabetes: The Eat to Live Plan to Prevent and Reverse Diabetes by Joel Fuhrman, MD.