This took me completely by surprise.
My book, which isn't going to be released until next June, already has a review on Goodreads.com. Is that crazy or what? Even better, it's a nice review, so I didn't have to brood about the house for a few days after reading it.
So how did this person manage to read a book which is still more than six months away from publication? Checking her profile, I see she is from the Czech Republic... the same country where the Shadow Saga was recently bought by Fantom Press. I'm guessing the reviewer must work for Fantom or one of the other publishers which was shown the manuscript.
Anyway, thank you KatiKat for the kind words!