From publisher blurb:
ENTENTE!
Enter a world of steam and intrigue!
Explore Perthessalus, a world where firearms, airships, and sorcery mix in a steampunk setting. Huge armies clash for honor and glory in the civilized lands, while bandits and marshals duel in the frontier. All the while, technology marches on.
In this book, you will find everything you need to adventure in the world of Perthessalus, including:
The half-catfolk race, a hybrid of elf and catfolk
Five new classes: the engineer, the marine, the medic, the politician, and the ritualist
Statistics for numerous firearms and artillery from the era
A variety of new airships, from small civilian models to the mighty air dreadnought, armed to the teeth with sixteen inch guns
Revised mass combat rules, allowing for larger armies
A gazetteer describing fifteen detailed nations of the world.
This is the world of Perthessalus, the world of the Gilded Suns!