In this action-adventure-fantasy, 12-year-old Pete (Irish) Kehoe thinks he's an ordinary kid-until trees start talking to him and an old woman tells him he's chosen to defend the mystical Otherworld against the King of Demons. "No way " he says, until a demon kidnaps his kid sister, Kathy. Then Irish and his two friends, Streak and Huff, time-hop to this besieged world of Celtic mythology to rescue her. But . . . are they ready to deal with a shape-shifter, a death fog, demon warriors, killer earthquakes and vicious flesh-eating wulgoars to save her? Can Irish's ancestor, the ancient Celtic warrior hero Cuchulain, or the talking trees, help the boys triumph over evil?