The story of Aradia and the information that she supposedly passed on to Charles Leland. I think that this has since been discredited, but it is a good book to read for refernce to the origins of modern witchcraft both from the Wiccan and Stregheria perspective. ( )

An important source for wiccan history. ( )

The edition I would recommend is: Leland (1998). Aradia or the Gospel of the witches: A new translation by Mario Pazzaglini and Dina Pazzaglini. Washington, Phoenix Publishing.

I'm not sure about the 2004 translation - the 1998 by the Pazzaglini is very good indeed, in terms of translation; they also offer Leland's translation (in which he often sacrificed meaning for rhyme), an Italian translation and the "original" dialect.

There is some discussion of the veracity of the ms., which is interesting but in some ways ultimately a question for the historian - the impact of Aradia is huge, no matter what the provenance.