Shane Arbuthnott: 2 books

Molly grew up hearing the tales of Haviland Stout, her ancestor who discovered the dangerous magical spirits that inhabit the far corners of the world. Now, on the edge of the New World, in the British Dominion of Terra Nova, Molly and her family collect spirits aboard their airship, the Legerdemain....

The city of Terra Nova was founded on a lie: that the spirits who cross over from the spirit world are evil and must be captured for the safety of humanity. But Molly Stout and her family have learned that the spirits are thinking, feeling beings, enslaved to enrich the wealthy, especially the spirit-harvesting...