Seeker

New York Times and USA Today bestselling author Veronica Rossi's new fantasy adventure in the Rider series — Seeker .
When Daryn claimed she was seeing "visions" during her sophomore year of high school, no one believed the truth. She wasn't losing her mind, she was gaining the Sight—the ability to see the future. If she just paid attention to the visions, they'd provide her with clues and show her how she could help people. Really help them. Daryn embraced her role as a Seeker. The work she did was important. She saved lives.
Until Sebastian.
Sebastian was her first—and worst—mistake.
Since the moment she inadvertently sealed him in a dark dimension with Samrael—the last surviving demon in the Kindred—guilt has plagued her. Daryn knows Sebastian is alive and waiting for help. It's up to her to rescue him. But now that she needs the Sight more than ever to guide her, the visions have stopped.
Daryn must rely on her instincts, her intelligence, and on blind faith to lead the riders who are counting on her in search of Sebastian. As they delve into a shadowy realm where nothing is as it seems and where Samrael is steadily amassing power, Daryn faces the ultimate test. Will she have to become evil to destroy evil? The very fate of humankind rests in the answer.