Whispers Under Ground (2012) is 3rd in the Rivers of London series.

Our central character is Police Constable and apprentice wizard Peter Grant.

Quite entertaining.

It’s a light read. I mainly enjoy the dry British humour.

The story begins just before Christmas when a reputable American art student, James Gallagher, is found stabbed to death on the tracks at Baker Street Underground station.

Because the murder weapon—a sharp piece of pottery—is heavily saturated with magical traces, the Metropolitan Police’s secret magical department, “The Folly,” is brought in to investigate.

As the son of a wealthy US Senator, the victim’s death threatens an international incident.

Peter has to work alongside a deeply religious FBI Special Agent, Kimberley Reynolds, who has been sent to monitor the case.

The investigation dives deep into London’s complex subterranean geography, taking Peter through:

• Enclaves of an entire hidden, secret society living entirely beneath the city.
• Active and abandoned London Underground tube tunnels.
• Disused Victorian sewer systems and forgotten bomb shelters.
• London’s buried, hidden subterranean rivers.