Time's Demon: BOOK II OF THE ISLEVALE CYCLE by D B Jackson
Fifteen year-old Tobias Doljan Walked back in time to prevent a war, but instead found himself trapped in an adult body, his king murdered and with an infant princess, Sofya, to protect. Now he has been joined by fellow Walker and Spanner, Mara, and together they must find a way to undo the timeline which orphaned the princess and destroyed their future. Arrayed against them are assassins who share their time-traveling powers, but have dark ambitions of their own, and the Tirribin demon, Droe, whose desperate quest for human love and Tobias leads her into alliances which threaten all of Islevale. File Under: Fantasy [ Time Killers | Span the Divide | Back to a Future | Enemies at Heart ]