Jon Hanna (1976- ) was born in Co. Down, Northern Ireland and has lived in Dublin, Ireland almost continually, since the age of 18.
He has practised several types of witchcraft since 1996, before being initiated into the Alexandrian Tradition in 2007.
In writing an essay as part of his training in that Tradition, he failed to keep an essay within the requested length; a felix culpa that resulted in the book-length essay that was later developed into his first book, "What thou wilt". This work was inspired by the differing experiences he himself had with different forms of witchcraft, but looks not to such individual experience but to compare different practices in their practitioners' own words, using publicly available resources to back up his assertions, and to consider wider societal influences that may have affected the differences that exist in the practice of witchcraft today.