While working in Denver, Colorado as a secretary, she met her husband George through their local congregation of The Church of Jesus Christ of Latter-day Saints (LDS Church, or Mormon). They moved to New York City, where she attended the City College of New York and her husband studied at New York University. They moved to California with their young daughter, Lori, when George was hired to teach political science at California State University, Los Angeles. Littke would teach at Pasadena City College and University of California, Los Angeles (UCLA). Her husband died in 1991.
Her first published pieces were for the Relief Society Magazine, Ellery Queen's Mystery Magazine, Ladies’ Home Journal, and Seventeen. She later began writing books, including titles for young adults and children, of which she has now published more than forty.
- Prom Dress (1989), Point Horror series
- Lucinda (1991), included in the Point Horror anthology Thirteen: 13 Tales of Horror)
- The Mystery of Ruby's Ghost (1992)
- The Watcher (1994), Point Horror series
- The Phantom Fair (1996)
- Haunted Sister (1998)
- Lake of Secrets (2002)
- Stories from the life of Joseph Smith (2003), coauthored with Richard Turley
- The Company of Good Women, 3 volumes (2006–08), coauthored with Nancy Anderson and Carroll Hofeling Morris
- Middle name from "Phantom fair /Lael Littke". Church History Library Catalog. LDS Church. Retrieved 2014-12-23.
- "The bridesmaids' dress disaster / Lael Littke.". Copyright Catalog (1978 to present). United States Copyright Catalog. Retrieved 2014-12-23.
- "Lael Littk". Authors. Macmillan Publishers. Retrieved 2014-12-23.
- "Lael Littke Biography". millereccles.org. The MILLER ECCLES Study Group. 2012. Retrieved 2014-12-23.
- "Lael J. Littke". Deseret Book. Retrieved 2014-12-23.