Weaverworld

Jack Fisher is a boy in trouble. Disobedient and rebellious, he fights with his sister Jillian, challenges his parents' authority and fails his classes at school. But when temptation overpowers his better judgment during the annual family reunion the consequences are more drastic than anyone could have imagined.
Ignoring his grandmother's warning to stay out, Jack goes up to the attic and tries on his grandfather's old bomber jacket and boots. Suddenly transported to a world called Weaverworld, Jack must quickly adjust to his new reality. Weaverworld is a mystical place and the longer he's there the more willing he is to let go of the rules from his life in the Realworld.
But not everything is as enchanting as it seems. Jack soon learns that Weaverworld can also be a dangerous and terrifying place as the vengeful Grimsnipe enmeshes him in an ever more dangerous web of intrigue. With his new friends at his side, Jack must find a way to fight this evil force before it succeeds in destroying both his family and the Weaver way of life.