The graveyard riddle - Lisa Thompson

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.

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.