You get it as part of the DAFNE training, and it's not exactly an handbook as such, and doesn't make sense without the training from the course...
If you are looking for a book concerning carb counting and MDD, then check out John Walsh's Using insulin or their is another one By Gary Sch (can't spell his surname) but it's called 'Think Like A Pancreas' Both pretty good books, but I prefer John Walsh's myself..
Or check out the http://www.bdec-e-learning.com/ which is a carb counting train course by Bornmouth hospital diabetic department..