I came to this book looking for an introduction to the various religions in the world, being raised quite secularly, myself. Since the book is the work of a number of different academic authors, with all their works brought together in concert, the quality of what is included in the book changes subtly from section to section. That said, the overall quality of the book was excellent for what I was looking for! I highly recommend this book to anyone looking for that same kind of overview and educational experience. It gives a surprising amount of depth of information for the length.
As a side note, the section on Christianity, in particular, same across as "this is why my religion isn't only great, it's THE BEST religion!". I took that with a grain of salt.