Book 2 in the After The Exit series.
"Viper’s not back. At least, that’s what Alina Maschik keeps saying. But when the head of MI6 requests her services, she agrees to a quick and simple job – plunging herself straight into trouble. Michael O’Reilly has a problem. His cover is close to being blown by the two people who know him and Viper best. When terrorists threaten the largest oil refinery in Europe, he’s more than ready to return to work—even if it means jumping into Viper’s hot water."