this is an amazon link http://www.amazon.com/World-Religions-Faiths-Explored-Explained/dp/0756617723 to one book, that also mentions several other books on world religions.

Is there a book that goes through the various religions (I realize there are many, but I guess the "major" ones) and what they believe in and the differences among them? Hope this isn't a dumb question, I just want to learn more about what people believe here and around the world.