Here are the official rules:
"Enter via the usual channels: Tweet about the giveaway or fan us on Facebook for an entry. To really increase your chances, we want to know what you think of our audiobooks! Review any of our titles on Amazon, Audible, Goodreads or iTunes. Leave a link in the comments section on this post, and earn three entries into the giveaway.
Feel free to leave your reviews on all these sites, and review as many Iambik titles you’ve listened to, and earn roughly eleventy hundred entries. (We’re word people; you do the math!) Good luck!"
Head to this page for more info: Iambik. Hurry! The drawing is at the end of this month.