Book of Mosiah

The Book of Mosiah (/moʊˈsaɪ.ə/ or /moʊˈzaɪ.ə/) is one of the books which make up the Book of Mormon. The title refers to Mosiah II, a king of the Nephites at Zarahemla. The book covers the time period between ca 130 BC and 91 BC, except for when the book has a flashback into the Record of Zeniff, which starts at ca 200 BC, according to footnotes. Aside from stating that it was abridged by Mormon, the text says nothing about its authorship.

Royal Skousen, a professor of linguistics at Brigham Young University, said contextual evidence indicated that the beginning of the original Book of Mosiah were probably lost in the 116 pages of the Book of Mormon manuscript lost by Martin Harris, meaning what is now known as the first chapter of Mosiah was originally the third chapter.

According to original research by John Sawyer and John W. Welch, the term mosiah was an ancient Hebrew term. The key meaning of the word mosiah was "savior."

...
Wikipedia