Ancient Shores

It turned up in a North Dakota wheat field: a triangle, like a shark's fin, sticking up from the black loam. Tom Lasker did what any farmer would have done. He dug it up. And discovered a boat, made of a fiberglass-like material with an utterly impossible atomic number. What it was doing buried under a dozen feet of prairie soil two thousand miles from any ocean, no one knew. True, Tom Lasker's wheat field had once been on the shoreline of a great inland sea, but that was a long time ago -- ten thousand years ago.
A return to science fiction on a grand scale, reminiscent of the best of Heinlein, Simak, and Clarke, Ancient Shores is the most ambitious and exciting SF triumph of the decade, a bold speculative adventure that does not shrink from the big questions -- and the big answers.
Buried 12 feet below Tom Lasker's North Dakota wheat field is a 42-foot fiberglass sailboat, complete with microwave oven. After digging it up, Tom makes the additional discovery of an object that serves as a doorway to another world--a find that will draw a far-flung collection of people with conflicting motives to the small community.