Seventh-day Adventists Answer Questions on Doctrine (generally known by the shortened title Questions on Doctrine, abbreviated QOD) is a book published by the Seventh-day Adventist Church in 1957 to help explain Adventism to conservative Protestants and Evangelicals. The book generated greater acceptance of the Adventist church within the evangelical community, where it had previously been widely regarded as a cult. However, it also proved to be one of the most controversial publications in Adventist history and the release of the book brought prolonged alienation and separation within Adventism and evangelicalism.

Although no authors are listed on the title of the book (credit is given to "a representative group" of Adventist "leaders, Bible teachers and editors"), the primary contributors to the book were Le Roy Edwin Froom, Walter E. Read, and Roy Allan Anderson (sometimes referred to as "FREDA").

In Adventist culture, the phrase Questions on Doctrine has come to encompass not only the book itself but also the history leading up to its publication and the prolonged theological controversy which it sparked. This article covers all of these facets of the book's history and legacy.