Here is the only place on the interwebs where you can get autographed copies of Adeena's books. (Previously, you had to run into Adeena at a sci-fi convention or know her in real life. LOL)
This is also a place to get your own copy of the audiobooks (as they're available -- more are in production).

And if you're outside the US? Paperbacks available to you as well! (But they're not signed... Adeena is looking into options to send you an autograph sticker to attach...)