I will admit from the start that I am a devotee of the GL diet, Nigel Denby and the whole 'Dietfreedom' online community thing they have set up. It has changed my life completely. I have read most of the GL books out there (coming through low fat, low carb and GI with no success first) - and the books Nigel writes with his co-authors, and the way the dietfreedom website is put together (online dieting club, community, advice etc) are the most well created of the lot. Nigel & co cut through the bla bla, the jargon and the need to be smug ;o) and get to the point.
This book specifically goes into more detail about the GL than the 7-Day GL Diet or the Cookbook they've released, but it does so without being complicated. As the title suggests it breaks it down into easily digested, bite sized pieces. The recipes are great too. There is good detail on how to adapt from high GL to low GL really easily which is very helpful, and delivered in typically simple and undramatic style. The resources in the book are great too, from the 'top ten' recommendations in part five (top 10 websites, top 10 food swaps) to the step by step guides into 'thinking GL'.
If you're looking for a really good way to lose weight and eat gorgeous food without putting any back on again and feel great - then I would say without any hesitation that you should hoover up the books by Nigel and co and get onto the community website too. It has changed my life, I hope you find the same.
PS when I posted this review the 'buy with' book was the GL Diet Cookbook - that's also a really good buy, I use it alot and have found it very inspiring too!