The Life and Adventures of John D.

John D. was a renowned mathematician, alchemist, astrologer, magician, and philosopher who had many significant encounters and connections with influential figures of the Elizabethan age. His life story includes involvement in Martin Frovescher's failed attempt to find a northwest passage, the invention of the concept of a British Empire, producing horoscopes, and consulting Queen Elizabeth on astrology. Despite being known for his fascination with magic and sorcery, Dee's expertise in mathematics is a crucial aspect of his career. His extensive library, though partly lost, contained a wide range of books on philosophy, science, mathematics, alchemy, and history, reflecting his intellectual pursuits. Dee's mathematical expertise, applied both in theoretical and practical contexts, allowed him to navigate the worlds of natural philosophy, engineering, and navigation.