3012: The Artifact — John M. Grier

After spending a lifetime traveling through time to visit any place or time period that strikes his fancy, Jack finds himself trapped one thousand years in the future, a future radically different from what he is used to. He quickly befriends Paul, an archeologist, who unwittingly helps him recover his lost time machine. The two of them, along with Janet, a government worker, and Suzie, a hologram with an infectious personality, set off on a quest to find a lost treasure. Their journey takes them throughout earth's history, from the far future to the distant past where they discover much of what they thought they knew about history and science was simply not true. Along the way, they encounter secret societies, dinosaurs, pirates, and political refugees. All four learn much about themselves while they experience for the first time the closeness of friends and family.