Others have written SF on the theme of immortality, but in The Boat of a Million Years, Poul Anderson made it his own.

Early in human history, certain individuals were born who live on, unaging, undying, through the centuries and millenia. We follow them through over 2000 years, up to our time and beyond-to the promise of utopia, and to the challenge of the stars.

A milestone in modern science fiction, a New York Times Notable Book on its first publication in 1989, this is one of a great writer's finest works.