Back in the 1990s, when Pais ("Subtle Is the Lord...") began to seriously consider writing about Oppenheimer, there was no full-scale biography of the scientist who led America's effort to create the atom bomb. But with a surfeit of books about Oppenheimer in the last year, this one comes too late—and suffers greatly in comparison to Kai Bird and Martin J. Sherwin's more comprehensive and cogent American Prometheus. Though Pais, a physicist as well as a science writer, was a close colleague of Oppenheimer's at Princeton's Institute for Advanced Studies, he is largely incurious about the parts of his subject's life that he didn't observe personally. He does little more than acknowledge the Manhattan Project, for example, noting that it has been covered elsewhere, and dismisses Oppenheimer's wife as despicable with barely any supporting evidence. Some chapters are assembled by lengthy quotes from secondary sources, others by anecdote, some barely developed past outline form; none are particularly engrossing. Pais died before he could write about the political hearings that cost Oppenheimer his security clearance and public reputation. The final chapters covering this period, written by Crease, a historian at Brookhaven National Laboratory and author of The Prism and the Pendulum, are such a marked improvement that one wishes he'd produced a biography on his own.