David Draper, nephew of Martian marine Bobbie Draper, is a chemistry student on Mars who gets pulled into supplying precursor chemicals to a drug operation. A ground-level view of Martian society during the events of Caliban's War - the claustrophobia of the domes, the weight of the terraforming project, and what the war looks like to people who aren't fighting it. Best read after Caliban's War.