The Hollow Boy by Jonathan Stroud (Paperback)

The Hollow Boy is the third book in the Lockwood and Co. series by Jonathan Stroud, author of the Bartimaeus trilogy. In a London plagued by ghosts that only young people can sense, Lucy, Lockwood, and George run a small psychic investigations agency. This installment brings new hauntings, rising danger, and shifting loyalties inside the team. A spooky, witty adventure for middle grade and teen readers and the basis of a Netflix series.