Giles Foden, the prizewinning author of The Last King of Scotland, delivers a mesmerizing blend of fact and fiction in this novel about how human beings deal with uncertainty. Five days before D-day, a team of Allied scientists is charged with making an accurate weather forecast for the landings. Henry Meadows—a young math prodigy from the Met Office—is sent to Scotland to uncover Wallace Ryman’s revolutionary system for understanding turbulence, one of the last great mysteries of modern physics. But Ryman is a reclusive pacifist who stubbornly refuses to divulge his secrets, and when Henry meets Gill—Ryman’s beautiful wife—events, like the weather, begin to spiral out of control.