2005 Oxford University Press hardcover, reissue w/ new covers, 0199213453. Concise dictionary of world religions w/ the usual thoroughness of the Oxford University Press.
This is one of the best reference books that I own. It functions not unlike a dictionary, providing a quick and remarkably accurate overview. The approach is especially beneficial when seeking comparative information.
Additional reference resources are frequently included, making it easy to locate in-depth information.
The book has been indispensable when I've needed a quick "bring me up to speed" reference for an unfamiliar religion. I've learned that there is a great deal of spiritual wisdom throughout the world's religions.