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I am, for whatever reason, interested in learning about the JSJ-decomposition of groups. Having asked around a bit, it was suggested I first learn about what is happening in the manifolds and then read up on the groups stuff. However, I need a reference: I need a book to learn from! Unfortunately, the book which was suggested to me - Hempel's 3-manifolds - is not held by my library, so I was wondering if anyone could perhaps suggest a book which covered the JSJ-decomposition of 3-manifolds (preferably from "the start", as it were), and as an added bonus talks a bit about groups...

(Also, I was contemplating buying Hempel's book, but I am a cheapskate and I've found a version from 1976 which is going cheap. Does anyone know if the book has been updated much since then?)

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    I got the book out today, and it certainly looks interesting. Thanks!2012-05-23

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