Hilda Stahl was an American author of middle grade and young adult novels, many of them in series. Most of her books are classified as Christian fiction. Biography from one of her books: "Hilda Stahl was born and raised in the Nebraska sandhills. As a Young teen she attended Bible college, where she met her husband, Norman. They raised their seven children in Michigan, where she lived until her death in 1993. When Hilda was a young mother with three children, she saw an ad in a magazine for a correspondence course in writing. She took the test, passed it, and soon fell in love with writing. She wrote whenever she had free time, and eventually began to sell her work. The first Elizabeth Gail book, The Mystery at the Johnson Farm, was made into a movie in 1989. It was a real dream come true for Hilda. She wanted her books and their message of God's love and power to reach and help people all over the world. — biography from Elizabeth Gail and the Mystery at the Johnson Farm