I went to random.org and used their number generator, and it picked #3, which means the winner is...
Kailana of The Written World!
Congratulations! Kailana, I will email you for your mailing address, and pass that on so you can receive your free copy of this wonderful book. I can't wait to hear what you think of it!
Thanks again to everyone who entered. I loved hearing about your favorite fictional worlds, some of which I was unfamiliar with, so now I have some new places to explore.
Please take a moment to check out my recent interview with Daniel Rabuzzi, the author of The Choir Boats, who has some fascinating things to say - including which fictional world he'd most like to visit. Thanks!