Peter and the shadow thieves / by Dave Barry and Ridley Pearson ; illustrations by Greg Call.

Enhanced descriptions from Syndetics:

In this riveting and adventure-packed follow-up to Peter and the Starcatchers , we discover Peter leaving the relative safety of Mollusk Island--along with his trusted companion Tinker Bell--for the cold, damp streets of London. On a difficult journey across the sea, he and Tink discover the darkand deadly, slithering part-man/part-creature Lord Ombra. It seems that the dreaded Ombra has a variety of mysterious powers including the ability to make shadows disappear. When Peter reaches London, he sets out to find the indomitable Molly. Together they must combat Ombra's terrible forces to both protect the Starcatchers and the treasured starstuff and most importantly to rescue Molly's mother from the clutches of evil. Dave Barry and Ridley Pearson have done it again--written a compulsively readable, impossible-to-put-down tale that will delight readers of all ages.