The Apex Operator's Secret Vow

Disowned by his powerful family for refusing an arranged marriage, Dane Kensington—code name Nightingale—is a retired Apex Operator at rock bottom. Then he receives a new mission: go undercover as the bodyguard of Valerie Montgomery, CEO of Montgomery Group. But Valerie is no ordinary client. She holds the key to the global security project known as Stardust—and a ruthless syndicate will stop at nothing to steal it. Dane takes the job, hiding his true identity while dodging assassins, corporate traitors, and Valerie's razor-sharp suspicions. What he never expects is to fall for the woman he's sworn to protect...