The Timefarer oleh Harrison Becket

JACK IS A YOUNG, newly single man living in modern day America. In spite of attempts to connect with his fellow human beings, he continues to feel like an outsider. On the way to work one morning he is involved in a terrible bus accident, which by way of a blow to the head, unlocks the innate ability within him to travel thru time. This single event launches the hero's adventure, where Jack comes in contact with an ancient order of humans known as Timefarers, who all share this same ability. One in particular, named Marcus (one of Alexander the Great's generals), takes him under his wing and facilitates his training in the art of combat and time travel. Jack will need his help in order to defeat the forces of evil from the deep past, already conspiring to bring an end to the age of man.