Cause, Principle and Unity and Essays on Magic, by Giordano Bruno – Edited by Richard J. Blackwell and Robert de Lucca Introduction by Alfonso Ingegno
The Occult Philosophy in the Elizabethan Age, by Francis Yates
The Art of Memory, by Francis Yates
Giordano Bruno and the Hermetic Tradition, by Francis Yates
The Expulsion of the Triumphant Beast, by Giordano Bruno – Translated with an Introduction and notes by Arthur D. Imerti
Giordano Bruno and Renaissance Science, by Hilary Gatti
Giordano Bruno: Philosopher Heretic, by Ingrid D. Rowland
There are of course many others, however, these are titles in which you can find on Amazon, Alibis, or in Borders, Barnes and Nobles, and more.