Reincarnation, the Spiral Staircase
God wants us to become free, and will help us once we sincerely want to be out. This is the goal of life, to get off of the wheel of karma and learn that we are truly a child of God.
He mentions how Mark Twain remembered past lives and tells of the story of a minister's meeting with the daughter of an American president.
A good book to learn more is Karma and Reincarnation, by Paramhanasa Yogananda.