Wrong Letter

The Home Secretary is found murdered. Even more bizarre is that the fact is communicated to the Scotland Yard before the commission of the deed. Superintendent Sinclair, as is usual, enlists the help of the amateur sleuth Sylvester Collins in what takes them on a journey of discovery which keeps the listener on the edge of their seats. The book is forwarded by none other than G.K.Chesterton - Summary by Yoganandh T