The Gnostic Religion: The message of the alien God and the beginnings of Christianity by Hans Jonas, the 1963 second revised paperback edition from Beacon Press, is part of the collection at the Reading Room.

“Here is a full-scale study of the heretical world of Gnosticism—its literature, symbolic language and main tenets—based on actual Gnostic documents and written by an eminent authority in the field. The paperback edition of this classic contains an important new chapter entitled ‘The Recent Discoveries in the Field of Gnosticism,’ and an epilogue on ‘Gnosticism, Existentialism and Nihilism.'” — back cover