Knot on Her Life is a cozy craft mystery book written by Mary Marks. The story revolves around Martha Rose, a quilter and owner of a quilt shop. When a fellow quilter is found dead at a quilting retreat, Martha becomes determined to uncover the truth. With the help of her quilting circle and her sharp wit, Martha delves into the world of quilting and uncovers a web of secrets, rivalries, and hidden motives. This book combines the charm of a small-town setting with the excitement of a murder mystery, making it a perfect choice for cozy craft mystery lovers.