The Paris Detective, by James Patterson
The most revered detective in Paris puts his skills to the test in three thrilling cases.
French Kiss: Very handsome and charming French detective Luc Moncrief joined the NYPD for a fresh start--but someone wants to make his first big case his last. Welcome to New York.
The Christmas Mystery: In the heart of the holiday season, priceless paintings have vanished from a Park Avenue murder scene. Now, dashing French detective Luc Moncrief must become a quick study in the art of the steal--before a coldblooded killer paints the town red. Merry Christmas, Detective.
French Twist: Gorgeous women are dropping dead at upscale department stores in New York City. Detective Luc Moncrief and Detective Katherine Burke are close to solving the mystery, but looks can be deceiving . . . .

Criminal Mischief, by Stuart Woods
After a dangerous adventure has him traveling up and down the coast, Stone Barrington is looking forward to some down time at his Manhattan abode. But when an acquaintance alerts him to a hinky plot being hatched across the city, he finds himself eager to pursue justice. 
After the mastermind behind it all proves more evasive than anyone was expecting, Stone sets out on an international chase to places he's never gone before. With the help of old friends—and alluring new ones—Stone is determined to see the pursuit through to the end, even if it means going up against a foe more unpredictable than he has ever faced...