I do notknow of any specific books on this subject, perhaps someone else does. I just go ahead and do it. I have a selection of body parts that I use to make figures, if the position of the part looks good I just use it. There are several on line hobby shop with books and I am sure some of them will have books on modeling figures. Also try amazon.com for books. HTH good luck and happy modeling.
Regards
Jon
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