Timetripper Series by Stefan Petrucha

Following the sudden death of his father, high-school student Harry Keller finds his mind full of strange visions of the past and future... moreFollowing the sudden death of his father, high-school student Harry Keller finds his mind full of strange visions of the past and future. Soon he can actually mentally leave "real" time and enter a place he dubs "ATime," where other people�s lives unwind around him in twisting trails that he can see and touch�and change! Unfortunately, A-Time is also inhabited by monstrous creatures called Quirks�deadly events trying to force their way into life trails so they can happen�as well as other humans who seek to distort the future for their own gain. In the first two books of this mind-bending new science fiction series, Harry begins to discover his ultimate purpose in A-Time. less

Anger is spreading like a plague at Harry Keller's high school. Seized by a strange, burning rage, students, teachers, and even the principal are lashing out at each other, only to find that their fury mysteriously vanishes as quickly as it comes.The rage seems to be feeding into itself and growing as petty arguments become violent. Harry just wants to avoid the whole mess before a riot breaks out, but he has a feeling that the answer to the anger can be found in A-Time... moreAnger is spreading like a plague at Harry Keller's high school. Seized by a strange, burning rage, students, teachers, and even the principal are lashing out at each other, only to find that their fury mysteriously vanishes as quickly as it comes.The rage seems to be feeding into itself and growing as petty arguments become violent. Harry just wants to avoid the whole mess before a riot breaks out, but he has a feeling that the answer to the anger can be found in A-Time.Will Harry unravel A-Time's twisted trails before the wrath turns deadly? less

Things are finally looking up for Harry Keller. It�s now a cinch for him to enter and leave A-Time�the alternate universe he discovered, where time and space collide. And in the real world, he isn�t totally devastated that his crush is dating someone else . . . especially when he hits it off with a cute new girl at school. But Harry has the feeling someone is pulling his strings. The question is: Who? And for what purpose? The more he probes, the more Harry begins to fear the answers. . . .