TimeTripper is a series of science fiction books by Stefan Petrucha following Harry Keller, a teenager who can see time itself and his love interest Siara Warner, who helps him through some tough situations.
Siara Warner, a high school junior, becomes attracted to a fellow student, Harry Keller, after witnessing him prevent a shooting, seemingly by accident.
Meanwhile, he semi-successfully explains his condition to Siara, who believes him insane until he successfully brings her into A-Time, where both struggle to prevent predestined events from occurring.
After he begins seeing glimpses of a warehouse fire in the future which will kill numerous people, Harry deduces that a single individual, capable of manipulating A-Time as he is, has been causing the abnormal temporal occurrences thus far.
Harry, drugged, delirious, and trapped in Windfree mental hospital, is incapable of entering A-Time, and though he knows the identity of the ' 'Daemon' ', he is dismissed as insane by his few visitors.