From publisher blurb:
In the age of steam, coal is king.
The Pure Steam campaign setting is set in the age of steam, and is fully compatible with the 5th edition of the world's most popular pen and paper roleplaying game. This book has everything you need to add some steam to your game. The Federated States of Ullera serve as the launching point for endless adventure. With Pure Steam, you can:
Explore an entire campaign world not unlike our own, with a bevy of politics, personalities, and plot hooks.
Plunge into the setting with original subraces, each fresh and with a rich history.
Take on the role of the Chaplain, a class able to heal, buff, harm, and bewilder allies and foes through personality and science. She adventures to further the goals of her association, each of which grants unique powers and options.
Power up as the Gearhead, a class able to create wondrous effects through the use of technology. The Gearhead is able to construct useful and dangerous gear on the fly with a draft book full of schematics.
Try your hand at one of the unique class archetypes such as the Blockade Runner, Moonshiner, Grease Rat, or Ructioneer.
Aim true and strike hard with new weapons, accessories, and gadgetry.
Kick the tires. Brand new vehicles promise rapid travel and dynamic combat.
Experience the horror science can awaken with new monsters such as the Reanimated Corpse and the Wondrous Armature.