The books were key pieces of evidence in the sexual assault trial of Michael Jeff . Jeffs , a polygamist sect leader , was convicted of sexually assaulting a 12 and 15-year - old . Court officials have released the chilling audiotapes that prosecutors say depict convicted child rapist Warren Jeffs training the girls he claimed were his `` spiritual wives '' to have sex with him . Jeffs refers to her sexual encounters with him as ` ` heavenly sessions '' ' The Lord has commanded that my sons , all of my ladies be trained , '' Jeffs says .
The books were key pieces of evidence in the sexual assault trial of Michael Jeff . Jeffs , a polygamist sect leader , was convicted of sexually assaulting a 12 and 15-year - old . Jeffs refers to her sexual encounters with him as ` ` heavenly sessions '' ' The Lord has commanded that my sons , all of my ladies be trained , '' Jeffs says .