Origin of the Soul and the Purpose of Reincarnation serves as a complement to prior books on reincarnation written by Dr. Semkiw, such as Born Again and Return of the Revolutionaries, which focus on cases that demonstrate objective evidence of reincarnation. Dr. Semkiw draws upon independent research, including books such as Twenty Cases of Reincarnation, and Xenoglossy, written by Ian Stevenson, MD, to better understand the nature of the soul and how reincarnation works. Dr. Semkiw also utilizes information gathered through Kevin Ryerson, a trance medium who has been featured in Shirley MacLaine's books, including Out on a Limb. Topics covered in Origin of the Soul include when and how souls were created, how personality is determined, the nature of soul mates, stages of human evolution, and the nature of time and space. Split incarnation, where one soul inhabits more than one body at a time, as well as ghosts, astrology, the Kabbalah, and Enneagrams are also addressed.