In the last few days, I've received a number of emails from US readers about the audiobooks for Dragon Keeper and Dragon Haven.
For reasons my agent and I are still untangling, US readers are unable to purchase these titles as audiobooks.
We are still trying to determine what is wrong. When we find out what is going on, or remedy the situation, I will post about it here.
For now, I fear I can only recommend that you try your local library! My Timberland Regional Library here has a wonderful app that I can use to download ebooks and audiobooks directly to my phone without even leaving my bedroom! I can only hope you are as fortunate, and that the books are available to you through the library.