We have Sade, a vagabond who makes her living hijacking airships. We have ghosts, and the people who can see them. We have some other magic powers (future sight, present sight, emotional manipulation, et cetera). We have the people who control those who have magic. We have floating islands above deadly gas. And a lot more.
Honestly, this book has so much, but it's not a super long book. It's broken up in three sections with each having a fairly distinct arc, but it's all told from Sade's POV. Both the world and the characters are interesting. There's also a sweet sapphic relationship.
I would recommend this to people who like gaslamp fantasy and stories that feature underdogs.