"February 1862. The Civil War is less than one year old. The fighting has begun in earnest, and the nation has begun to realize it is in for a long, bloody struggle. Meanwhile, President Lincoln's beloved eleven-year-old son, Willie, lies upstairs in the White House, gravely ill. In a matter of days, despite predictions of a recovery, Willie dies and is laid to rest in a Georgetown cemetery. "My poor boy, he was too good for this earth," the president...

"'Every catastrophe begins with a little problem that doesn't get fixed.' So says Pauline Green, president of the United States. A shrinking oasis in the Sahara Desert; a stolen US Army drone; an uninhabited Japanese island; and one country's secret stash of deadly chemical poisons: all these play roles in a relentlessly escalating crisis. Struggling to prevent the outbreak of a world war are a young woman intelligence officer; a spy working undercover...