Keeper of the Colony, Book 4 of the Keeper Series

When the curfew bell tolls in the Dark End you had better be off the street! The icy Colony of Javeer, brutally ruled by Horando and his Gulden Guard, is a horrific setting for Level 4 of Matt's computer game. Targon has disappeared and Varl has been thrown into Central Jail. When Matt attempts to rescue Varl, he learns that Horando is not the only enemy he must beat.