THE BOOK OF DOCTRINES AND OPINIONS BLOG: Interview with Yuval Harari- Jewish Magic before the Rise of Kabbalah (Alan Brill). A long, good introduction to the subject, followed by an excellent interview.
I noted Professor Harari's new book, Jewish Magic before the Rise of Kabbalah, here.
As I also noted earlier, Professor Harari's translation of the Hebrew-Aramaic magical treatise The Sword of Moses (Harba de-Moshe) is forthcoming in volume 2 of Old Testament Pseudepigrapha: More Noncanonical Scriptures. Likewise, my translation of the Hebrew magical treatise The Book of Mysteries (Sefer HaRazim) is forthcoming there too.