No espionage case in recent decades has been anything like the Wen Ho Lee affair. As Dan Stober and Ian Hoffman describe in A Convenient Spy, an astonishingly inept investigation of a crime that may never have occurred ended in a national disgrace. A weapons-code scientist at Los Alamos National Laboratory, Lee was hunted as a spy for China, indicted on fifty-nine counts, and held in detention for nine months as a threat to the entire nation. But after pleading guilty to just one count, he went home -- with an unusual and emotional apology from a federal judge. Prosecutors' claims...