Heinrich Cornelius Agrippa (1486-1535) is the most influential writer of renaissance esoterica. His De Occulta Philosophia (Of Occult Philosophy) appeared in three books. Written from 1509 to 1510, it circulated widely in manuscript form, and was eventually printed in 1533. It is a "systematic exposition of ... Ficinian spiritual magic and Trithemian demonic magic (and) ... treatised in practical magic" (I. P. Couliano in Hidden Truths 1987, p. 114).
Without doubt, this book should be at the top of any required reading list for those interested in Western magic and esoteric traditions.
"Recent historical investigation... assigns him a central place in the history of ideas of the Middle Ages; he is seen as characterizing the main line of intellectual development from Nicholas of Cusa to Sebastian Franck. Modern opinion evaluates him on the basis of his Platonic, Neoplatonic, and Hermetic influences - primarily in the De Occulta Philosophia..." (Agrippa von Nettesheim. In.: Dictionary of Scientific Biography. American Council of Learned Societies. Charles Scribner's Sons, New York 1970; vol. I, 79-81)
"In his influential work De occulta philosophia libri tres (1531), Agrippa combined magic, astrology, Qabbalah, theurgy, medicine, and the occult properties of plants, rocks, and metals. This work was an important factor in the spread of the idea of occult sciences." ; "The magical interpretation of Qabbalah reached its peak in Henri Cornelius Agrippa of Nettesheim's De occulta philosophia.".
This is a downloadable zip file containing the writings of H.C. Agrippa in .pdf form. Titles, all in English, on the disk are:
3 Books from 1651.pdf (this is a facsimile scan of De Occulta Philosophia translated from Latin by John French)
Of Occult Philosophy I - Natural Magic.pdf
Of Occult Philosophy II - Celstial magic.pdf
Of Occult Philosophy III - Ceremonial magic.pdf
Of Occult Philosophy IV - Of magical Ceremonies.pdf (this book is said to be spurious by some but has been attributed to Agrippa and is included in this collection.
Declamation on the Nobility and Preeminence of the Female Sex.pdf (an interesting work on the superiority of women to men, a rather remarkable concept for the time)
The Vanities of the Arts & Sciences - 1676 complete