After the White House asks coffeehouse manager and master roaster Clare Cosi to consult on the coffee service for a Rose Garden Wedding, she discovers a historic pot was used as a CIA "dead drop" decades before. Now long-simmering secrets boil over, scalding Clare and the people around her . . . Clare's visit to the nation's capital is off to a graceful start. Her octogenarian employer lands her a housesitting job in a charming Georgetown mansion,...