When medieval scholars sought to understand the nature of angels, they unwittingly laid the foundations of modern physics ...

Pablo, Angel o Demonio is the untold story of a man who changed our world forever. He created the multinational enterprise of cocaine trafficking and through terror ...

Larry Selden, professor emeritus of finance and economics at Columbia University, and Geoffrey Colvin, senior editor at large at Fortune magazine, argue in their book, Angel Customers & Demon ...