Stewart, Paul & Riddell, Chris (2008). The Curse of the Night Wolf. (Barnaby Grimes, bk.1) Grades 4-6.
Barnaby Grimes is a tick-tock lad, a.k.a fast messenger, in London. He leaps over rooftops to get his messages around town, but one night he happens to run into a giant beast! He is lucky and manages to escape the jaws of this enormous wolf, but some are not as lucky. After his friend Old Benjamin tells him about a miracle cure offered by a local doctor, he is attacked by an enormous wolf. When more people around town begin to disappear, Barnaby becomes suspicious that this miracle cure has something to do with it. He is determined to uncover the mystery behind these crimes in London, but will he be able to stop the brutal attacks or will he become a victim himself?