Chronicles of the Pneumatic Zeppelin Books in Order

The Chronicles of the Pneumatic Zeppelin books take place in a future California that has been wrecked by alien invasion, buried under snow, and rebuilt with steam power. The old map is still there, but everything on it has changed. Southern California is now Snow World, modern industry is gone, and human survivors live in rival clans that fly, fight, and bargain for whatever is left.

At the center of it all is Romulus Buckle, the young captain of the war zeppelin Pneumatic Zeppelin. He is brave, impulsive, loyal, and almost never allowed a quiet day. Around him is a crew that works like a patched-together family, including navigator Sabrina Serafim, the half-Martian engineer Max, and the wider Crankshaft clan that raised him. That found-family feeling is one of the series' anchors.

These books are built like big adventure serials. In Romulus Buckle & the City of the Founders, the job is rescue. In Romulus Buckle & the Engines of War, the pressure widens into clan politics and open conflict. An Officer and a Gentleman steps backward to show Romulus earlier in his life, when he is still proving himself under fire. Then Romulus Buckle and the Luminiferous Aether pushes the story into Atlantis, opening the series out from snowy wasteland skies to a strange underwater city.

The ongoing threat comes from the Founders, a secretive and powerful clan whose plans reach beyond one battle or one kidnapping. Their moves keep upsetting the balance among the clans, and that gives the series its longer arc. Romulus is not just chasing victory in a single fight. He is trying to protect his people, hold together uneasy alliances, and untangle mysteries tied to his missing sister, old wars, and the buried history of this broken world.

It is steampunk, but not in the usual Victorian London sense.

Preston mixes brass gadgets, muskets, swords, airship battles, mutant creatures, alien leftovers, and lost-city intrigue into one deliberately oversized package. The tone is adventurous first, with a lot of motion, banter, and cliff-edge peril. Even when the stakes get large, the books keep coming back to loyalty, duty, sibling bonds, and the question of how much one person should risk for family and crew.

If you like your steampunk with a post-apocalyptic edge, lots of sky action, and a hero who keeps getting pulled between war and rescue, this series knows exactly what it wants to be. Expect grand missions, strange machines, enemy factions, and a world that keeps opening outward as Romulus and his crew chase answers.