While Dee was a devout Christian, his faith and religion were extremely heterodox. His works on alchemy, astrology, and mathematics have become popular among occult circles, while his angel diaries were compiled as ''John Dee's Books of Mystery.'' | While Dee was a devout Christian, his faith and religion were extremely heterodox. His works on alchemy, astrology, and mathematics have become popular among occult circles, while his angel diaries were compiled as ''John Dee's Books of Mystery.'' |