The Powers that be by Michael Ryder

But with all things, there is hope... Callum was just an ordinary orphan boy (well ordinary for a thief that is), when a series of life threatening events lead to him discovering the secrets behind both his past and his future. His road takes him to the magical isle of Asturia, where he studies under the tutelage of the wizard Kulgrim. It is some years later when a kidnapping and ransom leads Callum, accompanied by his friend Aaron, on a quest into the unknown territory of the forbidden lands to retrieve an item of great power in exchange for his friend's life. Little does he know that the prophecies are true and that this is only the beginning of a great struggle with the dark powers that seek to destroy the Kingdom so that Rishnaa can once again rule supreme. Only the courage and determination of Callum and his friends can stop the second Great War coming and the Kingdom being lost for ever.