Carl Sagan

It is impossible to be neutral about Carl Sagan (1934-1996). Though supporters and detractors agree that he was one of the most brilliant and influential scientists of the 20th century, they argue about the ways he handled his gifts, fame and prominence. Poundstone (Prisoner's Dilemma; Big Secrets) does nothing to reconcile these disparities. Instead, he lays out the details of Sagan's life and work, revealing why some people idolized him and others disdained him. Sagan's overwhelming need for love and attention destroyed his first marriage to Lynn Margulis, Poundstone explains. Decades later, Margulis remains ambivalent, admiring Sagan the public figure but not the man. Second wife Linda Salzman could neither forgive Sagan nor understand his betrayal when he and their friend Ann Druyan announced that they were profoundly in love and planned to marry. Salzman is conspicuously missing from Poundstone's list of acknowledgments, just as Sagan's alienated best friend, Lester Grinspoon, was conspicuously absent--so reports Poundstone--from Sagan's deathbed. Sagan's scientific and public life is best known for its central quest and mission: searching for extraterrestrial life and sharing his love of science with the world. The so-far fruitless quest for ET continues, but Sagan's mission succeeded beyond all expectations. Because his greatest allegiance was to truth, Sagan would probably like this book. It tells readers why he chose to warn the world about ""nuclear winter"" despite weaknesses in the theory, and it includes the influence of marijuana highs on his work. Poundstone does not draw conclusions, but presents the evidence of Sagan's life and allows readers to develop their own theories of what that life might mean to their own. 16 b&w photos. Agent, John Brockman. (Oct.)