An action-packed fantasy adventure series from the authors behind Sabriel, The Keys to the Kingdom and The Fixers.Jack and Jaide Shield are determined to discover more about what it means to be a troubletwister, but their special powers remain untamed! Even troubletwisters have to go to school, but the twins remain vigilant for any sign of the Evil returning to Portland. The ancient instruments in the antiques store all register traces of Evil activity, even though nothing tangible can be found. Could it be something to do with the legendary Monster of Portland, which has supposedly been spotted roaming the streets at night?In this gripping new series of fantasy stories, international best-sellers Garth Nix and Sean Williams combine to create a world that will have boys and girls aged 10+ absolutely gripped. Ideally suited to fans of Percy Jackson and Harry Potter. Can twin siblings Jack and Jaide protect the earth from marauding Evil? Find out in Troubletwisters 3: The Mystery.