The Trilisk Ruins, by Michael McCloskey
This is another of those cheap n cheerful books by an unknown author that the Kindle is so good for. It, like most of his other books, appears to be only available as an e-book.
As is typical of books like this, the writing is not of the best. Dialogue is wooden, there are a few minor inconsistencies in the plot, and characters are very flat. But, as is also typical of these cheap self-published (I assume) e-book only stories, it's a decent enough piece of light entertainment, and so gets three stars. It would get less if it had all the extra costs of "proper" publishing, but as it is you can still just sit back and enjoy the story.
Oh, and there's an obvious setup for a sequel, which I look forward to reading.