Considered one of Ben Bova's most famous Grand Tour novels: "A gripping, realistic tale of man's first expedition to the red planet. Don't miss it" (Terry Brooks, New York Times–bestselling author of The Shannara Chronicles).   Jamie Waterman is a young Navaho geologist who is picked for the ground team of the first manned expedition to Mars. He will be joining an international team of astronauts and scientists. But once the crew land on the red planet, they soon discover they must battle not only the alien land on which they have invaded but earthbound bureaucrats as well. When they come face to face with a chasm ten times as deep and large as the Grand Canyon, all twenty-five astronauts must face the most shocking discovery of all . . .   "The science fiction author who will have the greatest effect on the world." —Ray Bradbury, author of Farenheit 451   "A splendid book . . . Of his many books, Mars must be the most important." —Arthur C. Clarke, author of Islands in the Sky