Brigham Young lists the "standard works" as being a distinct category from the Bible, Book of Mormon, and Doctrine and Covenants.
Brigham Young, "Items of History—the Pioneers—Talking to the Children—Peace in Utah—God a Personage of Tabernacle—the Foolish Fashions," Journal of Discourses, 26 vols. (Liverpool: William Budge, 1878), 19:64
Study the Bible, the Book of Mormon, the Doctrine and Covenants, read the sermons that are published in the Deseret News, as well as all the standard works of the Church. Such reading will afford you instruction and improvement; but novels allure the mind and are without profit.