One of the best books on paganism is Drawing Down the Moon by Margot Adler. Scott Cunningham has a good intro into Wicca. I just searched & found on a US book seller site a book called Paganism: An Introduction to Earth centred religions, which seems to have good reviews.
I've been reading about goddesses and the sacred feminine...I can recommend some books but it's not exactly paganism, but more about different cultures and their take on the sacred feminine.
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