Jacob and the Blue Jewel

Jacob has moved to a new area and new school leaving his friends behind. Worse still he is being bullied. All this changes when he finds a strange blue stone and meets an odd tramp and an odder green creature. After following his nemesis through a magic door he finds himself in a strange new world which is in the middle of an invasion by an evil race. To escape he must join a quest to assemble the magic Blue Jewel and make a prophesy come true. All does not go well.