If you have any interest in steampunk at all, this series should be at the top of your to read list. The world build is a perfect mix of industrial and fantastical. The society is delightfully skewed and often brutal, and horrifyingly believable.
This was a book bursting with pure, enjoyable high adventure. As a bonus, the two lead characters from Court of the Air made an appearance, and while they were not technically center stage for this adventure, they worked very well with those who were.
There is a new threat to the Kingdom of Jackals, and it comes in the form of the invading Army of Shadows. The Army leaves desolate wastelands in its wake as its bizarre creatures rape lands to supply the needs of the Masters. It is up to Molly, Oliver, the Commodore, Coppertracks, and young Purity Drake to somehow stop the Army, defeat the Masters, and save their world. There are hijinks and shenanigans aplenty, politics and dark magics.
We get to see more of the Steam Nation and its sentient race of steam men, which I always enjoy. A nice mix of technomancy and voodoo make the steam culture one of my favorites in the books.
As always, it is the tone of this series that brings me back again and again with such delight. High stakes mayhem and cunning social commentary work very well together and make for some amazing page turners.
Court of the Air is the first book in the series, followed by Kingdom Beyond the Waves. They are all brilliant reads, and I cannot recommend them highly enough. They are fun, pure and simple, and everything else ties into that sense of fun and excitement to make one of the most satisfying reads I have enjoyed in a long time.