What is your favorite diabetic cookbook?

My sister was recently diagnosed with diabetes, and I would like to get her a cookbook or two for Christmas. I looked online, and there are hundreds of diabetic cookbooks. Rather than randomly choosing one, I thought to seek the experience of the collective. I would like to get her a book with a wide variety of recipes that:
-avoid difficult-to-find ingredients
-work on a budget
-taste incredible

So, do you have a favorite diabetic cookbook? If so, why is that one your favorite?
Is this an insensitive gift idea?