The events are all pretty aligned with the first few hundred years of the Book of Mormon, apparently, just set in the future with technology and a few other heres and theres. I realized this and that the lead character's name Nafai is too close to Nephi to not go hand in hand. The family leaving the city, his brothers hating him, Nafai being spoken to by the Oversoul, etc are all things that happen to Nephi in the Book of Mormon.

I'm not sure he if branches off into his own creativity and develops his own story with it or if he generally sticks to the Book of Mormon events. I would have probably been pushed to reading more if it was his own thing instead of being based on scripture.