The Chronicles of Jack Mccool - the Amulet of Athlone
R. E Devine

Who is Jack McCool? Hes a regular wise-cracking school boy, expert multiple biscuit eater and dodger of homework who likes nothing better than chilling out on his bed with his dog, Fergus. Its no wonder Jacks room is his refuge, considering his crazy family and the daily onslaught he faces at school from his arch enemies: Miss Medusa, his lip-curling teacher, and Oscar the school bully. And oh yeah, Jacks just discovered he holds the key to breaking an ancient curse. Travelling back in time thanks to a dusty old trunk he finds in the attic, Jack joins forces with a warrior from the past, takes on a vengeful king and travels the world to solve the secrets of the magical Amulet of Athlone by retrieving its six enchanted gemstones from the clutches of some seriously devious and dangerous characters.