William Le Queux 
Tracked by Wireless [EPUB ebook] 

Primarily known as a diplomat and journalist, Le Queuz went on to become a master of the mystery genre. In this book, he introduces the topics of wireless technology and weaves a tale full of treachery and intrigue that sees poison, attempted murder, and secrets turn Geoffrey Galconer’s life upside down. This is a thrilling tale that will excite even modern readers who are used to much greater technology. (Amazon)