If you've read Aaron Gray and the Dragon War then please please please can you leave the book a review, either on Amazon or Goodreads (or even both)? I really can't emphasise how important this is for me as an author.
Both Amazon and Goodreads use their customer reviews to decide whether to recommend particular books to other people, and when I try to get other bookstores to stock the book, the first thing they do is check what people think of it online, so you can see the awesome power that's in your hands right now that could make the book a success.
You don't have to write much, just give it a rating and say something like "I liked it". If you want to write more then of course that would be amazing, and, as you know by now I feature exciting reviews and messages in the usual Friday blog slot.