The Adamantine Palace begins with an interesting premise: dragons, once hunters of humans, are now slaves to them, kept in check by alchemists' potions. But one day a single dragon goes missing, threatening to undo everything the humans have done since they triumphed over the dragons.
It's a relatively light read, one that can be finished in a few days, and perhaps not for readers who like narrative padded with description and well-rounded world-building; the book is a little thin in these aspects. The characterisation of the power-hungry characters is also a little flat. Neither does it help that there are few if any sympathetic characters in the entire novel; at first, the rogue dragon is endearing in her innocence, but as she learns more about the reality of the world she becomes merciless and as hard to like as the humans.
The key weakness of the novel is that it hinges on "Machiavellian" politics (the blurb's words, not mine) rather than the rogue dragon, but Deas just isn't a skilled-enough writer to justify this. You get the sense that he aspires to the level of George RR Martin, but he just hasn't reached it. It's all confusion and no excitement, and as a result you simply end up not caring, and scanning over these parts.
Nevertheless, it's still a book worth reading and I will probably be buying the sequel. It's mildly gripping (the dragon's parts, at least), and there a few lines that'll make you snort/laugh in amusement. It's not wholly satisfying, but you could do worse.