Bill Guggenheim is a pioneer in the field of After-Death Communication (ADC) experiences. He is considered to be the "father of ADC research" after he experienced a spiritual awakening in 1974 that would shape the rest of his life. Over the course of four months, he received messages from the "other side" that consisted of short stories, philosophy, parables, and poetry - all of which affirmed life after death - something that challenged his belief system as he did not believe prior to his experiences.