Mormon's Book The Book of Mormon is a sacred text of the Latter Day Saint movement, which adherents believe contains writings of ancient prophets who lived on the American continent from approximately 2200 BC to AD 421. The app comes with unique features such as- -Word by Word Voice Narration with 5 voice types and adjustable voice pitch. -Search the book -Select the type and size of font. -Resume right where you left. -3 types of viewing modes.