The scope of this book is truly extraordinary. At last, a practical guide on mediumship that does not leave out the necessary historical, scientific and philosophical background. Based on the author’s long-established expertise in the field, with decades of work as a dialoguer and director of mediumistic groups, it offers advice on safety and health regarding both mediums and mediumistic groups. A worthy companion of Talking to Spirits in Mediumistic Meetings.  Also available in Amazon.