The Angel of the West Window is a weird fiction novel written in 1927 by Gustav Meyrink (original German title: Der Engel vom westlichen Fenster) steeped in alchemical, hermetic, occult and mystical imagery and ideas interweaving the life of Elizabethan Magus Dr John Dee with that of a fictional modern descendant, Baron Mueller.
Among them he finds the personal diaries of Dr John Dee, the Elizabethan magus, astrologer, and alchemist who served in the court of Queen Elizabeth I and was an ancestor of both Roger and the Baron.
As the book ends, Mueller vanquishes Isaïs in her form as the Princess Shotokalungin and becomes a Man of the Rose, part of a group of humans who have become immortal through their spiritual strivings whose task is to help mankind develop and grow (a concept similar to that of ascended masters or Secret Chiefs).
Meyrink interweaves the two narratives into a complex and multilayered exploration of a host of occult and esoteric ideas: reincarnation, alchemy, the Hieros Gamos, paganism and Christianity, Tantra, scrying, mediumship and the search for human transcendence and immortality.
[1] The last novel Meyrink wrote before he died, The Angel Of The West Window is regarded as, if not his most famous work (a claim usually made for his novel the Golem), certainly his most ambitious and multi-layered.