The atonement of Christ is very clearly described in the Book of Mormon, in 2 Nephi 9, much clearer than in the Bible. I appreciate the Book of Mormon’s clarity on this topic, because the Book of Mormon helps to be able to explain what the atonement is to others who have not read the Book of Mormon.
I had that opportunity, when I walked on the pier last summer in Oceanside. I was approached by a gentleman who was sharing the gospel for his church. We had a great discussion. I brought up the atonement, and he did not understand it. Since I did, because I have read the Book of Mormon, I was able to explain it to him. He was very thankful, and so was I.