by Dorothy Gilman, 1970
Laurie recommended. Great, fun book. Wonderful characters and action-packed spy story set in Turkey. Emily Pollifax, elderly lady, works for CIA. Goes to Turkey to rescue an old CIA agent, Magda, and ends up exposing a traitor, Dr. Belleaux, and boosting the courage and confidence of a young Englishman, Colin (whose sister she sat next to on the plane to Istanbul).