Time Chaser — Grace Brannigan

This is an OpenDyslexic edition With dragons in the skies, magical horses and an alternate universe, "Time Chaser" is a Young Adult time travel fantasy with a twist. Fourteen year-old William Remington comes from a long line of time travelers ... he just doesn't know it yet. After retrieving a tattered cloth from a fire that his father had tried to burn, William is fascinated and yet repelled by the stories the smoldering cloth reveals. It shows him a life he knows nothing about. His own life in the year 1228 When he's sucked through a time warp into Middle Ages England, he must learn to survive on his wits. There he meets Trea, a girl whose mother is captivated and held captive by a sorcerer and his book of spells. Trea also seems caught in the time warp, but William soon realizes she's guarding deadly secrets -- secrets which could prove fatal if she decides to do the sorcerer's bidding. With his future uncertain, William realizes that he must defeat the sorcerer or forever be trapped in a time where he does not belong.