What is dylan mulvaney book of mormon?

Dylan Mulvaney is not an author of the Book of Mormon. The Book of Mormon is a sacred text of the Latter-day Saint movement and is believed by followers to be a record of ancient prophets in the Americas. It was first published in 1830 by Joseph Smith, Jr., the founder of the Latter-day Saint movement. The book tells the story of a group of Israelites who migrated from Jerusalem to the Americas around 600 BC and their interactions with the indigenous people there. The Book of Mormon is considered scripture by members of The Church of Jesus Christ of Latter-day Saints and other Latter-day Saint denominations.