Lynn Sheffield Simmons holds a bachelor's degree in elementary education and a master's degree in special education from Texas Woman's University. She is a member of Phi Delta Kappa honorary fraternity and taught in the public schools. She has been a free lance writer for many years and taught the course "Writing for Children" through the Continuing Education Department at the University of North Texas. She has been the featured speaker at The Craft of Writing conference held on the campus of the University of North Texas, the High Plains Book Festival in Amarillo, Texas, Raising a Reader Book Fair in Lubbock, Texas, and the Midland Reading Council in Midland, Texas. She is the founder and past president of the North Texas Book Festival, Inc. (www.ntbf.org) that provides grants to school libraries, public libraries and literacy programs in the North Texas area.

Mrs. Simmons' award winning column, "Up A Creek," historical reviews, and feature stories have appeared in a number of newspapers and magazines. She was Newspaper-in-Education co-ordinator for the Denton Record-Chronicle and wrote two booklets, Using the Newspaper to Teach Reading Readiness Activities: A Parents Guide and Newspaper in the Home: How to Help Your Child With Homework, that was distributed by the newspaper. Her historical pageant, The Place is Argyle and her Easter pageants have been performed in Argyle, Texas many times.

In 1993 – 1995, Mrs. Simmons was president of the Denton Branch of the American Association of University Women. Twice she served as fifth vice-president (tabloid chairman) in the Denton Benefit League - 1995-1996 and 1997-1998.

Mrs. Simmons is the founder and the first president of the Communities Civic League (www.cclargyle.org) a non-profit organization she planned out in 1998 to provide grants to other non-profit organizations in the Argyle area. In the year 2000 she was awarded the Argyle Community Woman's Achievement Award for her volunteer contributions to the community.

When Mrs. Simmons saw a need for the senior citizens of Argyle to have a place to meet, do exercises, eat lunch, and socialize, she organized and began the Argyle Seniors’ Activities Center in 2005. The ASAC meets at the First Baptist Church Argyle every Wednesday and Friday where she and her husband are co-directors.

Mrs. Simmons is the author of the popular children's books Sugar Lump, the Orphan Calf, Sugar Lump’s Night Before Christmas, Bo, the Famous Retriever, Bo and the Missing Dogs, Bo and the Night Intruder, Bo and the Roaring Pines, Bo and the Christmas Bandit, and Jack Crow Said Hello. She lives on a small farm in Argyle with her husband, Larry, who for many years had a dental practice in Denton, Texas.