What's A Book Galley?

I was looking for books from my favorite author, and I found one of her books for sale that wont be coming out until May 6, 2008. Of course I was curiouse and clicked on it and it said that it was a book galley, or a review copy. I was just wondering what this is, and if it is even worth my time and money to bid... show more I was looking for books from my favorite author, and I found one of her books for sale that wont be coming out until May 6, 2008. Of course I was curiouse and clicked on it and it said that it was a book galley, or a review copy.

I was just wondering what this is, and if it is even worth my time and money to bid on.

Thank you. :)
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