This is a very poorly written book, it reads like a writing class project. The project is as follows:

4 bodies are found in a coal hole in present day London, Ruth Rendell's retired dectective Wexford investigates. You must write this as 'Ruth Rendell', but in the style of Agatha Christie, so that anything that has happened in the UK since 1960 is greeted with suspicion, trepidation and awe - mobile phones, the internet, East European immigrants, female detectives, and so on.

The plot must also depend very heavily on a ludicrous set of co-incidences. Eh Voila as Poirot would no doubt say, you have 'The Vault' by 'Ruth Rendell'. See if you can get past the first chapter!