This book is a unique study of how the role of 'the messenger' has changed throughout history, starting from ancient times and ending with the person's role today. The chapters include an analysis of the personal characteristics required by a messenger, the dangers they often have to face, especially in troubled times, and how they have the power to change the course of history because of their functions. The book analyses various types of messengers who were, and are still, significant, and ends by looking at how the role will continue to develop and change, taking technological advances into account. The book, in short, is unusual, captivating and will be of interest to an informed general readership and academics of various disciplines. Of particular interest will be the analysis the book provides of the messengers we send into space in search of life, and the potential messengers who will visit our planet in the future.