Code Name Blue Wren: The True Story of America’s Most Dangerous Female Spy — And the Sister She Betrayed Jim Popkin Hanover Square Press, 352 pages, $27.99 ...

Yet in Code Name Blue Wren (the label given by U.S. officials to Montes’s case), Popkin dismisses Montes’s avowed reason for spying—her deeply felt opposition to U.S. policies in Central America and ...