The Vanished Messenger is a mysterious, detective, and fictional book which is written by Sir E. Phillips Oppenheim. The narrative opens in the Hague, a gathering of European countries is taking place for which England has not been extended an invitation. Due to uninvited England, people thought that war was going to start. After a train crash in England, Mr. John P. Dunster, an American, unexpectedly vanishes while en route to the Hague with a crucial document that could stop the war from starting. While routing towards Hague, Mr, Dunster disappeared this disappearance caused chaos in Conference. Then, the British government asks Richard Hamel, a mining engineer, to investigate the disappearance of Dunster and try to stop a war from breaking out in Europe. Then, how will Mr. Dunster be successful in presenting the document? Will Richard Hamel succeed in his mission? How will the war get stopped? To get answers to these questions, readers should read this book which has a lot of mystery!