John Welch. The Sermon at the Temple and the Sermon on the Mount: A Latter-day Saint Approach. (Salt Lake City: Deseret Book and FARMS, 1990.)

• Approaches the Sermon on the Mount (Matt. 5-7) and the Sermon at the Temple (3 Nephi 12-14) as a temple text, or a sort-of temple-preparation. class. This is a fascinating approach and well done.
• FARMS review here.
• FAIR Bookstore, Deseret Book
• Gospelink (requires subscription)