It was a time of revolution. The Roman Revolution describes the little known "crisis of the third century", and how it led to a revolutionary new Roman Empire. Long before the more famous collapse of the Western Roman Empire in the fifth century, in the years between AD 235-275, barbarian invasions, civil war, and plague devastated ancient Rome.

The encyclopedia once shaped our understanding of the world. Created by thousands of scholars and the most obsessive of editors, a good set conveyed a sense of absolute wisdom on its reader. Contributions from Albert Einstein, Sigmund Freud, Orville Wright, Alfred Hitchcock, Marie Curie and Indira Gandhi helped millions of children with their homework. Adults cleared their shelves in the belief that everything that was explainable was now effortlessly accessible in their living rooms.

Amaryllis Fox's riveting memoir tells the story of her 10 years in the most elite clandestine ops unit of the CIA, hunting the world's most dangerous terrorists in 16 countries while marrying and giving birth to a daughter. Life Undercover is exhilarating, intimate, fiercely intelligent - an impossible-to-pause record of an extraordinary life, and of Amaryllis Fox's astonishing courage and passion.

In a captivating tour of cities famous and forgotten, acclaimed historian Ben Wilson tells the glorious, millennia-spanning story how urban living sparked humankind's greatest innovations.

For over three decades, Ray Kurzweil has been one of the most respected and provocative advocates of the role of technology in our future. In his classic The Age of Spiritual Machines, he argued that computers would soon rival the full range of human intelligence at its best. Now he examines the next step in this inexorable evolutionary process: The union of human and machine, in which the knowledge and skills embedded in our brains will be combined with the vastly greater capacity, speed, and knowledge-sharing ability of our creations.