Hellerism: Second-Sight Mystery, Supernatural Vision Or Second-Sight, What Is It? A Mystery is a book written by Hermon and Harry. The book explores the concept of second-sight, also known as hellerism, which is the ability to see events or objects that are not present in the physical world. The authors delve into the history and origins of hellerism, as well as the different methods and techniques used to develop this ability. They also examine the...