In 2021, radio astronomy on the Moon reveals the presence of life by a nearby red dwarf, on a tide-locked planet.[a] To investigate, Earth's governments convert a space colony into Lancer, a Bussard ramjet-powered interstellar ship based on the design of a crashed alien ship discovered in the Mare Marginis. Condition is Acceptable: This used book shows wear to edges and cover, creases to cover and spine, writing inside, and some yellowing of pages. See photos for condition.