B.A.D. Agency series by Sherrilyn Kenyon

Bad Attitude

BAD agent Sydney Westbrook must find the perfect sniper for a risky counter-terrorism mission. J.D. Steele, a military sniper whose attitude problem landed him in prison, seems a good candidate. But as they're dragged into a secret world of freelance killers, Sydney begins to discover the man of honor and passion beneath Steele's arrogant façade. It's a man even Steele didn't know he could be -- and a man whose mission will risk the life of the only woman he's ever loved...
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The League series by Sherrilyn Kenyon

Born of Night

*In the Ichidian Universe, The League and their ruthless assassins rule all. Expertly trained and highly valued, the League Assassins are the backbone of the government. But not even the League is immune to corruption . . .* Command Assassin Nykyrian Quikiades once turned his back on the League—and has been hunted by them ever since. Though many have tried, none can kill him or stop him from completing his current mission: to protect Kiara Zamir, a woman whose father’s political alliance has made her a target. As her world becomes even deadlier, Kiara must entrust her life to the same kind of beast who once killed her mother and left her for dead. Old enemies and new threaten them both and the only way they can survive is to overcome their suspicions and learn to trust in the very ones who threaten them the most: each other.
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Dark-Hunter series by Sherrilyn Kenyon

Night Pleasures

*The Dark-Hunters are ancient warriors who have sworn to protect mankind and the fate of the world is in their hands. . .* He is solitude. He is darkness. He is the ruler of the night. Yet Kyrian of Thrace has just woken up handcuffed to his worst nightmare: An accountant. Worse, she's being hunted by one of the most lethal vampires out there. And if Amanda Devereaux goes down, then he does too. But it's not just their lives that are hanging in the balance.  Kyrian and Amanda are all that stands between humanity and oblivion. Let's hope they win.
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Belador series by Sherrilyn Kenyon

Blood Trinity

All her life, Evalle has been straddling the line between human and demon. Curious about her origins, but content to live in the shadows, she finds that anonymity threatened by escalating conflicts between species. Accused of a savage murder, she's forced center stage in what seems like the beginning of an Atlanta apocalypse. Before long though, her personal problems will submerge as she learns startling facts about a hoard of supernatural terrorists. The launch volume of a much-anticipated mass-market original paranormal romance series.
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Chronicles of Nick series by Sherrilyn Kenyon

Infinity

At fourteen, Nick Gautier thinks he knows everything about the world around him. Streetwise, tough and savvy, his quick sarcasm is the stuff of legends. . . until the night when his best friends try to kill him. Saved by a mysterious warrior who has more fighting skills than Chuck Norris, Nick is sucked into the realm of the Dark-Hunters: immortal vampire slayers who risk everything to save humanity. Nick quickly learns that the human world is only a veil for a much larger and more dangerous one: a world where the captain of the football team is a werewolf and the girl he has a crush on goes out at night to stake the undead. But before he can even learn the rules of this new world, his fellow students are turning into flesh eating zombies. And he's next on the menu. As if starting high school isn't hard enough. . . now Nick has to hide his new friends from his mom, his chainsaw from the principal, and keep the zombies and the demon Simi from eating his brains, all without getting grounded or suspended. How in the world is he supposed to do that?
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