Searching for magic

Leroy is our hero. He is a wizard. Well not strictly speaking a wizard. He is a boy who can sort of accidentally do spells so he is rather weak wizard which as you can imagine causes a bit of a stir in Warwick Avon school of majiks. Anyway....the World as we know It is in danger and the only one you can save everyone is a smarty pants magicless boy, an over enthusiastic elf sarcastic and sulky vampire and a snobbish bossy dragon. Oh dear...