Complex sentence: At the beginning of the book when Cal discusses his family's history and actions prior to his birth, he speaks in an androgynous voice, with limited omniscience; he acknowledges that he is fabricating some of the details.
Split into simpler sentences: At the beginning of the book when Cal discusses about his family before his birth, he speaks in an androgynous voice and seems to know all that is occurring and has occurred. His omniscience is "limited"; he acknowledges that he is fabricating some of the details.