Undercover is a 2015 novel by American author Danielle Steel.

The novel details a romance between a former DEA agent, Marshall Everett, and a fashion editor, Ariana Gregory, who meet in Paris.

[1] Ariana Gregory, the daughter of a recently widowed US ambassador, arrives in Paris a year after being kidnapped in Buenos Aires.

There she meets Marshall Everett, a former undercover DEA agent.

Ann-Maree Lourey of the New Castle Herald praised the story's gripping plot and pointed out its similarities to the Patty Hearst kidnapping.