Keep Out

With Earth overcrowded and Mars seemingly lifeless, humanity launches an extraordinary experiment: raise a generation of children who can truly belong on the Red Planet. A remarkable drug called daptine allows their bodies—and those of their descendants—to adapt gradually to thin air, bitter cold, unfamiliar conditions, and the demands of a new world.

At ten years old, the children are finally told the truth about their origins and their future. They are the first Martians, raised inside a glassite dome and prepared to leave it as adults, but their lessons reveal that survival depends on more than biology. As they grow stronger, stranger, and increasingly independent, an overlooked weakness in human nature begins to threaten the colony’s carefully planned future. This classic science-fiction story combines a fascinating vision of planetary adaptation with the suspense of a society built on an experiment no one can fully control.