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I'm taking a course in many-particle theory, and have begun to understand that Feynman diagrams are kind of relevant in this theory. The problem have been that introductions to these diagrams in the literature have been rather vague. Mostly you're shown that second quantization gives an endless amount of elements so we have to use Wicks theorem and then they prove Wicks theorem. But hey! That didn't look nice either; let's use Feynman diagrams. And then they dump a lot of diagrams over you and tell you how to read them in second quantization. This might be somewhat confusing. A Guide to Feynman Diagrams in the Many-body Problem makes you deconfused. The book has five levels; pre-kindergarten, kindergarten, elementary, intermediate and advanced. The pre-kindergarten part leeds you through the field of many-particle theory with pictures, cartoons and no mathematics. The kindergarten part gives an introduction "somewhere between Donald Duck and the American Journal of Physics". The elementary part are the standard many-body introduction. The intermediate part gives a derivation diagram rules and the advanced part shows in detail the mathematics behind typical many-body calculations. One more thing: The book is great fun to read.
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