A Book Written By The Spirits Of The So-Called Dead, With Their Own Materialized Hands, By The Process Of Independent Slate Writing (1883) : Kessinger Publishing : 9781164517191 : 1164517198 : 10 Sep 2010 : ""A Book Written By The Spirits Of The So-Called Dead, With Their Own Materialized Hands, By The Process Of Independent Slate Writing"" is a unique and intriguing book written by Carl Gustaf Helleberg in 1883. The book claims to be written by spirits of the dead, who have used the process of independent slate writing to communicate their messages to the living world.The book is a collection of messages and stories supposedly channeled through the medium of slate writing, a practice where spirits would use a slate board and chalk to communicate with the living. The book is divided into chapters, each one containing messages from different spirits on various topics, including life after death, the spirit world, and the nature of the universe.The author, Helleberg, was a Swedish spirit