At Bertram's Hotel - Agatha Christie

When Miss Marple comes to London for a private holiday, Bertram's Hotel has everything she wants: traditional atmosphere, classy service and memories of the old days.

But her unerring sense senses an air of danger behind the shimmery exteriors of the things around her!

What is the hidden connection between a series of acts of violence and crime with that simple incident: the departure of one of the hotel's respected butlers to fly out late for his appointment?