As smart as the Plum series with a little bit of Remington Steele thrown in for good measure. Or The Thomas Crowne Affair. Pierce Brosnan on the brain toward the end of 2015 for some reason. Thanks to Amy for telling me about the series and to Chicago Public Library for having them available via Overdrive. (In order for the first three in the series - The Heist, The Case, The Job).