When I bought this book I didn’t expect that it was written after Slavenburg’s “The Secret Words” (see review elsewhere). Also this is one fairly old (1993), but a real jewel and I can be pretty short about it.
As the title suggests this book is about “Gnosis”. However it is a really small book (11,5x21x1,5 and about 150 pages of text) Slavenburg managed to give a wonderfull overview of both ancient and modern Gnosis. Supported with many quotes, with a logical stucture and (maybe even the best of all) a list with (as far I as know) all known Gnostic writings at the end of the book.
The ultimate introduction to the Gnostic tradition.