"Masters of Space: Morse and Speech; Thompson and Cable; Bell and telephone; Marconi and the wireless telegraph; Maps and the Wireless Telephone" - in this book, the author Walter Kellogg Towers tells about the great achievements of five outstanding scientists who changed the way people communicate in the early 20th century. You will learn about the invention of the telegraph and telephone, as well as the first wireless telegraph and telephone. The author follows a light and exciting style, which makes this book interesting for lovers of popular science literature and the history of technology.