The purpose of this book is to prove the presence among us of the Secret Masters of Time, who travel through it at will. The author tried to analyze and unravel all the time paradoxes that science fiction often uses. The book tells about the adventures of amazing people, very similar to aliens from the future, living in our time, as well as those who lived in past centuries. Some of them became legends, such as Melchizedek, Emperor Fo-Hi or Leonardo da Vinci, etc.