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... You can purchase a signed bookplate, however!)