The Book of Soyga, also titled Aldaraia, is a 16th-century Latin treatise on magic, one copy of which is known to have been possessed by the Elizabethan scholar John Dee. After Dee\\\'s death, the book was thought to be lost until 1994 when two manuscripts were located in the British Library (Sloane MS. 8) and the Bodleian Library (Bodley MS. 908), under the title Aldaraia sive Soyga vocor, by Dee scholar Deborah Harkness. The Sloane 8 version is also described as Tractatus Astrologico Magicus, though both versions differ only slightly.
John Dee是1500年伊丽莎白女王一世底下的知名数学家与天文学家。他也对神祕科学与奥祕的东西有兴趣。他还拥有英过最大的图书馆。
他有一天发现了神秘密语的索亚之书,他为这本书贡献了一生。Dee只能证实这魔法典是魔法咒语的概要。但他无法破解它的密语,他死后这本书遗失了500年。1994年这本书的两个版本又出现在英国图书馆里,但至今还没有人可以解码这本书。