Harold McGee is the best: www.amazon.com/Food-Cooking-Science-Lore-Kitchen/dp/0684800012/ref=sr_1_1?s=books&ie=UTF8&qid=1305300188&sr=1-1

Microwave Candy was inspired by Harold McGee's article on microwave candy, and most of what I learned about sugar came from his wicked book, On Food and Cooking. I swear there is no better book. 

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