The Kights of Liöfwende, book 1: Spiggot's Quest
Garry Kilworth2002

Faerieland...
It's like a reflection of your world. A warped reflection. And Jack has just stumbled right into it - with a whole lot of trouble on his tail. Trolls, goblins, ogres and giants... all after one thing. But Jack's got no clue what. He needs some allies, like now. A wizard maybe. Or a High Fairy. Someone who can do serious magic. Someone who can help him get home. Anyone. Just not some dreamy young boggart named Spiggot...