Which English Spy Thriller Novels Follow Deep-Cover Intelligence Agents?

What happens when two worlds collide? One world is filled with crime, death and destruction and the other filled with the need for justice and to serve and protect? 25 year old Agent Teagan Mulholland is about to be thrown undercover into the world of the mafia. To bring down the infamous Moretti family, a family her department have been trying to take down for 25 years. The man she needs to get close to is none other than 30 year old Don Antonio Moretti, the most dangerous man in the country. Her target, the man she needs to take down to redeem herself. But all is not as simple as one would think. Will the truth be revealed about who she is? Can love conquer all? Will everything that she has hidden come to light? Will her family’s past be uncovered? Will either Antonio or Teagan come out unscathed? Or will the betrayal and deceit destroy everything they have both worked hard for? The answers will all be uncovered.

Luna Winterbourne’s life felt utterly suffocating ever since her father hired Matteo Vicenzo as her bodyguard. The man was far too possessive, as if he had no understanding of the word privacy. Shockingly, something humiliating happened on the night of her engagement. Someone set her up, and Luna ended up in the same bed as Matteo. The incident enraged her father, leading to Luna’s expulsion and Matteo’s disgraceful dismissal. With no family members willing to take her in, Matteo offered her a place to stay—an offer Luna reluctantly accepted, even though it was hard for her to believe he wasn’t the one who orchestrated that shameful night. As time passed, Luna finally softened to Matteo’s sincerity. Love blossomed between them, until the day Matteo revealed who he truly was!

In a deadly game of spies and dealers, trust is the ultimate weapon—and love the most dangerous betrayal. Sabrina is a cold, detached assassin, trained to infiltrate, manipulate, and eliminate without hesitation. But her latest mission is different: Viktor, a sadistic arms dealer with a dangerous empire, is her target. What begins as a professional operation soon turns into a psychological nightmare. Viktor has secrets of his own and plays a twisted game, pushing her to her limits with violence and manipulation. As Sabrina is drawn deeper into his dark world, she begins to lose herself, torn between completing the mission and the suffocating love Viktor offers. She must decide: escape or join him in the darkness.

Extreme beauty, intelligence, and unique set of skills. Zea was only seventeen back then and everything in her life was perfect. But not until they killed her father and took away the man that she loves. Driven, she set out overseas and train to be the best special agent. And after nine long years, she's given an assignment. A dangerous, highly classified mission, as an undercover high school student. In a well-known university that is secretly run by a viciously organized underground syndicate, that is strongly linked to her father's death. Determined to seek justice. Everything is right in place. But not until she found him—again.

(Book 1 of The Cypher Agency Series) "I'm your superior, don't ever fall in love with me. But if I fall, don't hesitate to pull the trigger." Top Agent Wave aka Allister, would rather take a bullet than fall in love. When the feisty and strong Agent Nova aka Hira Callan came, missions became difficult. Their relationship should only be professional and nothing more but one night changed it all. "Don't trust anyone. Even salt looks like sugar." This is book 1 of The Cypher Agency Series. This can be read as a stand alone.

“You are playing with fire, Alyssa,” he warned. “I’m trying not to lose control.” The emotions were roiling inside of her, building to something far greater than anything she’d experienced with any other man. Sometimes we run away from the one person we should be running to... *** From USA Today bestselling author and the author of Billionaire’s Secret Baby, comes a brand-new suspenseful romance about a socialite falling in love with the man ordered to protect her. With one hell of a twist, this steamy romance is a must read! Agent Scott Tabor was as sexy walking away as he was coming toward you. You know the kind of attractive that makes your mouth dry, and your palms sweat before you ever speak to the man? Yeah… that’s my reality. But let’s back up a second. It all started a few weeks after my parents died in a freak accident. While I was trying to grieve, my long-lost uncle came into the picture. At first, I thought Uncle Frank was trying to make an effort—until I came home to a nightmare. Forced to abandon my apartment, I turned to my lawyer and old boyfriend, Nate Livingston. Only his very pregnant wife wasn’t too happy with me hanging around. And who could blame her? Meanwhile, Uncle Frank was doing everything in his power to make my life a living hell. Enter Scott Tabor, FBI agent extraordinaire and my new roommate. I’m sure we can keep everything platonic. After all, we are both adults. Adults with wants, needs, and dare I say, an insane attraction for each other?