French historian René le Forestier’s monumental and solidly scholarly Les Illuminés de Bavière et la franc-maçonnerie allemande has been the go-to work on the original Order of the Illuminati since it came out in 1914.
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Andreas Önnerfors. Freemasonry: A Very Short Introduction, Oxford University Press.
Cécile Révauger. Black Freemasonry: From Prince Hall to the Giants of Jazz. Inner Traditions, 2016
Richard Cassaro. Written in Stone. Deeper Truth Books, 2011.
Short it may be (just 146 small format pages), but Gaskell's book is still a very comprehensive history and analysis of witch belief in (mostly) the western world. The author is Reader in Early Modern History at the University of East Anglia, and has written extensively on witchcraft and witch trials. He is the author of Hellish Nell, an account of England's last 'witchcraft' trial in the 1940s.