The Abramelin Operation is an occult ritual intended to lead to enlightenment from one's 'guardian angel', which has had an awesome reputation since S. L. McGregor Mathers first translated it in 1897. Few people had attempted it by the 1970s and even the famous Aleister Crowley failed to complete it in 1901.This is Ramsey Dukes's occult diary for the six months of his 1977 Abramelin operation, plus three introductions giving: 1) a brief history of the book and the tradition; 2) his story of the Abramelin book and how he decided to do the operation; 3) a retrospective comment on what the operation did for the author, its value and significance.