About the Author

Sean Martin is the author of several other Pocket Essentials titles, including "Alchemy and Alchemists," "Andrei Tarkovsky," "The Cathars," "The Gnostics," and "The Knights Templar."

Reviews

"An exemplary introduction." --Telegraph on The Cathars

"An insightful guide." --New Statesman

"Well written, informative account." --Independent on The Gnostics