Dare Me by Calista Fox

“When people start vanishing, it can get very dangerous for anyone asking too many questions. Do you understand?”
Dr. Nikki Kane has established a network of psychiatric and legal professionals to travel globally in response to epic catastrophes and to aid search and rescue teams. On her way now to Switzerland for her latest quest, she’s left behind a mystery—the disappearance of a devastatingly handsome hero in a series of blasts that rocked Mexico City. But when he ends up in the seat next to her in first class… Nikki has to immediately question who he is—and whether his intentions are as dark and dangerous as she fears.
Damen Castillo also wants answers. How did Nikki end up with a device lodged in her laptop’s USB port that not only contains vital data that will lead him to a terrorist cell, but which is also tracking their whereabouts right this very second.
Who is she and why the hell can’t he resist the stunning redhead? With a deadly threat closing in on them and their scorching-hot chemistry blazing between them, Nikki and Damen buckle up for one tumultuous—and sexy—ride.