Hiya! I recommend you buy patrick holfords Low GL diet cookbook. It is an update to his gi bible and a great companion!
It has everything from the concepts of the diet, to shopping lists, to menus, to recipes. And it sets out easy to understand quantities of pretty much all staple foods (fruit,breads,pulses,veg etc) needed to either lose or maintain weight.
It is a great book and easy to get your head round! Xxx
Ps it also has a whole section of low gl snacks.