McDonald published ', the first volume of a proposed science fiction duology, in 2015. It explores the dangerous intrigue that surrounds the five powerful families who control industry on the Moon. McDonald said of the novel in August 2014, "I’m still writing about developing economies, it’s just that this one happens to be on the Moon." Before critics called the novel ""Game of Thrones" in space", McDonald himself dubbed it ""Game of Domes"" and ""Dallas" in space". "Luna" was optioned for development as a television series before its release. The sequel, ', was released in March 2017. A third novel, "Luna: Moon Rising", was released in March 2019. McDonald previously published the novelette "The Fifth Dragon", a prequel to "Luna" in the same setting, in the 2014 anthology "Reach for Infinity".