Supersymmetry Weinberg Vol. 3
Weinberg does a good job going over the algebra of Supersymmetry, writing it out in painful excruciating step by step detail. Its a good exercise for every physicist to see once and awhile and he is my reference book now.
However, you don't really learn how to calculate things fast and efficiently with Weinberg and its hard to learn with. For instance his supergraph and superspace sections is abymsal and completely opaque upon first reading.
I highly suggest any number of alternatives, some of them online
eg hep-th/0108200, hep-th/9612114
Try also D. Bailin & A. Love and Srivastava if you don't like Wess and Bagger