Yeah Mormons believe in a third chapter of the bible, but they aren't considered Christians.
Source: Mormon family for neighbors
Probably because they deviated too much from the core "Christian" stuff.
But if you believe in the resurrection of Jesus Christ when he died and stuff, you are basically a "Christian" by definition.
Christ-ian.
Christ.
But being that the Book of Mormon is an entirely different stuff that has to do with really early America/some dude digging up golden tablets inside of a hill, it really shouldn't have to do with it. More like "
Homo sapiens have four limbs as well as the
Pan troglodytes" but you know what I mean.