Material and Ethereal

The Farther Reaches of Human Nature by A. Maslow

The Unquiet Dead: A Psychologist Treats Spirit Possession by Dr. Edith Fiore

Thirty years among the dead by Dr. Carl Wickland 

Many Lives, Many Masters: The True Story of a Prominent Psychiatrist, His Young Patient, and the Past-Life Therapy That Changed Both Their Lives by Dr. Brian Weiss

A Wanderer in the Spirit Lands

Communications with the spirit world of God by Johannes Greber

Joan of Arc by Mark Twain

Jesus – New Insights into His Life and Mission by Walther Hinz

Rare Earth: Why Complex Life is Uncommon in the Universe