California girl Livvi Gray has always been haunted by a terrifying nightmare of an eerily beautiful stranger in a shimmering silver dress. Shortly before Livvi’s thirtieth birthday she will come face to face with the stranger from her dream, an encounter that will not only alter Livvi’s future, but change much of what she thinks she knows about the past.

The Book of Someday tells Livvi’s story in parallel with that of a brilliant Boston photographer named Micah and a young Long Island wife and mother named AnnaLee. Like Livvi, these two women are swiftly moving toward events that will prove to be the ultimate turning points in their lives, the places where devastating secrets will be exposed—secrets about the unexpected ways in which we choose to protect, and betray, the people we love.