Five Books of Mystery (Grimoire)

In his Five Books of Mystery, John Dee describes his communications with angels (particularly the angel Uriel), and the process he goes through to discover the names of previously unknown angels, which he finds in letter grids and confirms with Uriel. This system, which bears a passing resemblance to the game boggle, accounts for the phonological divergence of the names found in this book, compared to conventional angel names.

Och is listed as an angel here, rather than as an Olympian spirit, as in Arbatel.

This grimoire mentions the grimoire Book of Soyga

Timeline of related events

1500

1527

Birth of John Dee (wrote this grimoire)

1600

1608

Death of John Dee (wrote this grimoire)