Tad R. Callister is among the most beloved Latter-day Saint authors whose titles include "The Infinite Atonement" and "The Inevitable Apostasy." In his new book, “A Case for the Book of Mormon,” the former Sunday School general president builds upon his general conference talk, which makes a full case (including what detractors might say) for this keystone of the Latter-day Saint faith, complete with witnesses, evidence and a closing argument.