Jeanne C’s Comments: The book is a series of short essays in which the author explains how each invention came to be and how it has changed the lives of its readers. For example, we learn that passports were originally letters of permission to travel and were provided by nobility to their subordinates. In 1920, after World War II, The League of Nations formally standardized passports and contributed to making them widely required. Another topic of interest is barbed wire and how its invention in 1876 shaped the European settlement of North America and the notion of private ownership of land. Topics are diverse and times span far into the past and right up to today’s technological achievements.