Return to the wonderful characters of beloved, bestselling, award-winning The Goldfish Boy, one of the most talked-about debut children's books of recent years. The Magpie Riddle was previously published as The Graveyard Riddle. Melody Bird has discovered an old abandoned house in the corner of the graveyard, and a mysterious boy hiding out there...

Hal tells her that he's a spy-in-training, using the house as a base for his undercover surveillance of a known local criminal. Her friends Matthew and Jake don't believe that a teenager would be entrusted with this mission and turn the tables to spy on him, uncovering secrets and unravelling a mystery as they go.