Artemis

Artemis is a small city built in five connected domes on the lunar surface. Tourists pay huge sums to visit, while workers live in cramped quarters and count every gram of imported goods. Jazz Bashara, who arrived as a child with her father, a respected welder, is smart, stubborn and broke. She earns her living as a porter and smuggler, has failed the exam to become a guide for moon walks, and dreams of saving enough to escape her tiny bunk.

Then Trond Landvik, a rich businessman and one of her regular customers, offers her a fortune to secretly disable the automated harvesters of the company that supplies the city's aluminum. The plan requires an illegal trip outside the domes, improvised tools and a lot of chemistry, and when it goes wrong Jazz learns that powerful people want the city's industry for themselves. With the help of a few friends, her estranged father and grudging cooperation from the city's security chief, she has to come up with an even bigger plan. Between chapters, letters to her childhood pen pal on Earth fill in her past.

Light, quick and packed with clever solutions. About 368 pages in paperback.