Francis A. Yates 
Lull & Bruno [PDF ebook] 

First published in 1999.This is Volume VIII of ten of the selected works of Frances A. Yates. The studies reprinted here demonstrate not only the range of Frances A. Yate“s learning but her determination to go to the root of a problem. In order to understand the thought of Giordano Bruno, Dame Frances found it necessary to investigate the role of Lullism in the Renaissance and this led her back three centuries to the origins of the Art of Ramon Lull.