Powers That Be by Anne McCaffrey and Elizabeth Ann Scarborough.
I purchased this at the Friends of the Penfield LIbrary book sale, and stuck it in my workout bag to read at the gym. And then I got caught up in the story and devoured it all at once, and need to find something else for the gym. Maybe I should order the sequel....
This is the story of Yana, a soldier in a massively bureaucratic company, who is retired to the barely-terraformed planet of Petaybee after she's gassed in an attack on colonists who have taken over a space station. It's about how she fits in with the PTB colonists, and gets involved with the strange things happening there -- unauthorized modifications to terran animal stock, disappearing survey teams, and an abrasive Company liason.
Very lighthearted reading, as you would expect if you're familiar with the authors. There are unicorns (of a sort), dogsledding, and romance.