There is a great deal more humour in this book than some of the others in the Martin Beck series and there is incredible confidence being shown by the authors.
It's hard to imagine anyone effectively sidelining the main character for half of the story as the action focuses elsewhere but this is what they do with Beck who as a result cuts an even lonelier figure.
In a tale dominated by bank robberies and blundering officials Beck concentrates his mind on working out just who killed the man in the locked room.
Review on completion soon...