This book consists of detailed instructions for communicating with angels and employing their aid for practical purposes. It consists of excerpts, in Grimoire form, from Dr. Dee’s detailed records of his “mystical exercises”. This is a transcription from the original in Dee’s own handwriting, now found in the British Library under the catalog number Sloane 3191. There have been two other published editions of this text, one by Robert Turner, 1983 revised 1986, and another by Geoffrey James, 1984 and 1994

De Heptarchia Mystica – John Dee