Fever novels

MacKayla Lane’s life is good. She has great friends, a decent job, and a car that breaks down only every other week or so. In other words, she’s your perfectly ordinary twenty-first-century woman. Or so she thinks . . . until something extraordinary happens.
When her sister is murdered, leaving a single clue to her death—a cryptic message on Mac’s cell phone—Mac journeys to Ireland in search of answers. The...

Sidhe-seer MacKayla Lane finds that time is running out as All Hallows' Eve approaches and she struggles to keep the Sinsar Dubh, an ancient book of dark magic that only she knows how to find, out of the hands of Fae and human alike.

#1 NEW YORK TIMES BESTSELLER
“Evil is a completely different creature, Mac. Evil is bad that believes it’s good.”
 
MacKayla Lane was just a child when she and her sister, Alina, were given up for adoption and banished from Ireland forever. 
Twenty years later, Alina is dead and Mac has returned to the country that expelled them to hunt her sister’s murderer....

"MacKayla Lane would do anything to save the home she loves. A gifted sidhe-seer, she's already fought and defeated the deadly Sinsar Dubh--an ancient book of terrible evil--yet its hold on her has never been stronger. When the wall that protected humans from the seductive, insatiable Fae was destroyed on Halloween, long-imprisoned immortals ravaged the planet. Now Dublin is a war zone with factions battling for control. As the city heats up and the...

"As Mac, Barrons, Ryodan, and Jada struggle to restore control, enemies become allies, right and wrong cease to exist, and the lines between life and death, lust and love, disappear completely...This time, there's no gain without sacrifice, no pursuit without risk, no victory without irrevocable loss. In the battle for Mac's soul, every decision exacts a tremendous price."--Book jacket.

"MacKayla Lane faces the ultimate threat when war breaks out between the kingdoms of shadow and light, as the #1 New York Times bestselling Fever series races to an explosive revelation. From the moment MacKayla Lane arrived in Dublin to hunt her sister's murderer, she's had to fight one dangerous battle after the next: to survive, to secure power, to keep her city safe, to protect the people she loves. The matter of who's good and who's evil can...