Return to Mars
Ben Bova
 Navajo geologist Jamie Waterman returned to Earth as a hero, travelling the globe, giving speeches on Mars, and supporting a return voyage. Now six years later, Waterman gets to return to his beloved red planet, and to the mysterious dwelling in the Valles Marineris region. However, the second voyage has sponsorship not from governments, but from corporations, most notably from millionaire Daryl Trumball, whose son is sent on the mission to make his father proud... and money. Now, Jamie finds himself locked in a war between Trumball's wishes of exploiting the planet, his job as mission director, and his own desires to explore the cliff dwelling that could hold the key to discovering the planet's past inhabitants.