Curved Space to Corsair by Jemima Pett
Corsair: a planet in thrall to the Imperium. The Imperium: a dictatorial oligarchy which likes to think it’s benevolent.
The remnant of Corsair’s population have sent out a message for aid, for someone to rescue them… and Pete Garcia is ready to answer their call.
Big Pete and the Swede, as they call the two Viridian System asteroid miners, decide to take Dolores and Maggie on holiday, and give Dolores more practice in how to be a space pilot. A course error takes them through a wormhole, into unmapped space. Will they ever get back to fulfil Pete’s mission?
Meanwhile the Imperium declares war on the Federation, while a little personal business by one of the senators leads him off in the direction of the Viridian System to start a canny land grab.