Yesterday I listed a few of the things covered in the book. Here are some more items of interest it contains.
1. Oliver's letters are the only source for many details about the early events of the Restoration.
2. Oliver's Letter I is excerpted in the Pearl of Great Price.
3. Joseph had his scribes copy Oliver's letters into his personal history.
4. Oliver's Letter VII was re-published several times through 1844.
5. Oliver describes Moroni by saying "the stature of this personage was a little above the common size of men in this age."
6. Oliver says Moroni's "garment was perfectly white, and had the appearance of being without seam."
7. Oliver says Moroni "said this history was written and deposited not far from that place."
Think about that last one. We know the plates were deposited not far from that place (i.e., Joseph's home where Moroni was speaking to him). But if the history was also written "not far from that place," then it was not written in Mesoamerica.
8. On April 3, 1836, just a few months after Oliver published Letter VII and Joseph's scribes copied it into Joseph's personal history, Moses, Elias, Elijah, and the Lord Himself appeared to Joseph and Oliver in the Kirtland temple. "Behold, your sins are forgiven you; you are clean before me; therefore, lift up your heads and rejoice." D&C 110:5.
9. Oliver remained a faithful witness of the Book of Mormon throughout his life.