The positive response to our text published two decades ago and its quick sell-out encouraged us after careful consideration to produce this second and H\'fEX-typed version. We observed that our text was used or recommended in courses at several universities. Naturally, the most positive response (particularly from the US) came from those for whom the text was written, namely students and others without prior knowledge of supersymmetry. We thank our readers for this feedback and other comments. This success assured us that indeed there was a definite demand for a text like our's with explicit calculational details. In this second edition we have corrected writing errors we became aware of. We have also made minor changes here and there, and we cite more literature.