Jeremy T. Runnells is a critic of The Church of Jesus Christ of Latter-day Saints (LDS Church) and author of the book titled A Letter to a CES Director (later renamed CES Letter). Runnells grew up as a seventh-generation member of the LDS Church with pioneer ancestry. He served a mission for the church in New York and graduated from church-owned Brigham Young University. In 2012, he began to experience doubts over his faith. A director of institute of the LDS Church's Church Education System (CES) asked him to write his concerns, and in response Runnells sent an 84-page letter with his concerns.