The Custard Protocol Books in Order

The Custard Protocol moves the Parasolverse into the 1890s and opens it up into a globe-trotting adventure series. If the Alexia books are built around one formidable heroine and the Finishing School books are a clever school story, these novels are Carriger's airship ensemble. The heart of the series is the Spotted Custard, a high-tech dirigible full of people who are competent, chaotic, loyal, and usually one poor decision away from a fresh international incident.

Tea is still extremely important.

The series starts with Prudence, which follows Prudence Alessandra Maccon Akeldama, usually called Rue, as she inherits an airship and promptly heads for India. Rue is the daughter of Alexia and Lord Maccon, but she is very much her own sort of trouble, sociable where Alexia is blunt, stylish where others are merely dressed, and blessed with metanatural abilities that make every diplomatic mess more complicated. Imprudence continues her travels and family entanglements, while Competence and Reticence widen the spotlight to include Primrose and Percival Tunstell as the crew's adventures become stranger and more personal.

What links the books is not just movement from place to place, although there is plenty of that. It is the way Carriger uses travel to explore how the supernatural has changed across the wider world. Floating cities, new species, unusual technologies, hidden societies, and political friction all enter the picture. The series still feels funny and airy, but it is also the part of the Parasolverse that most obviously asks what happens when British assumptions meet everywhere else.

The crew dynamic is the real engine. Rue's friends and relations are the sort of people who can argue about fashion, rescue operations, and tea in the same conversation. By the later books, the series becomes as much about belonging as adventure. Characters who once looked like side pieces grow into their own emotional weight, and the books get a little gentler and more reflective without losing the jokes.

Read these if you want steampunk travel adventure, family chaos, ensemble banter, and a Parasolverse that feels broader and weirder than ever. It is still the same world of manners, supernaturals, and absurd detail, just seen from the deck of a very busy airship.