Very useful information in this book! Also, here are some tips regarding purchasing diabetes supplies on Amazon (or other supply sites): If you are tired of using old-fashioned lancets, tired of waiting in line at your local pharmacy to purchase your testing supplies, tired of the complications of using regular blood glucose testing meters and test strips, or are even tired of using your current glucose meter because it just doesn't have the features you're looking for, you're in lu.... View more detail.