Every once in a while, a new thriller writer emerges with such an instant command of his craft that readers everywhere take notice. Such a one is John Altman, with A Gathering of Spies. In 1943, America thought it had rounded up all the German spies on its soil. It was wrong. Now, Germany's greatest weapon-a woman with special talents, both for tradecraft and for death-is headed home with critical information about the still-developing atomic bomb, and the Allies' chief hope for stopping her is a British agent with agendas of his own. Originally recruited into MI5 to pose as a double agent, he's been telling the Germans that he'd do anything to free his wife, a prisoner of a Polish concentration camp. This happens to be true. The question is: How much would he really do to set her free? Where are his loyalties exactly?