Diana Bakewell is London's best connected tour guide. She's got friends all over the city, which helps her make the tours she runs for Chartwell and Crouch bus tours extra special. With her young colleague Zaf Williams, bus driver Newton Crombie and stowaway cat Gus, they take groups all across London, showing them the sights and sharing stories of their beloved city.

But then on a tour of the Houses of Parliament, they and their tour group witness a murder. Could a member of their party be involved in the crime? And will Diana work out who the killer is before the police do?

Read the London Cosy Crime series for a series of fiendish and sometimes hilarious mysteries at London's best known landmarks. Diana and Zaf soon become amateur sleuths as well as tour guides - but can they solve their own mysteries?

Perfect for fans of MC Beaton, Anthony Horowitz and Richard Osman