L. M. Justus graduated with a Bachelor of Mathematics from the University of Waterloo. After working in the high-tech industry as a quality assurance software tester, she made the transition into technical writing. Choosing to focus on her family, she left the high-tech field to become a full-time homemaker. She has always had a passion for writing and self-published her first full-length novel as part of the NaNoWriMo challenge. She wrote her second novel for her children. The books in her YA fantasy Darkness trilogy, Welcome to the Darkness, Darkness Reigns and Embrace the Darkness are available for sale at most major retailers.

Her husband and their three children live in Ottawa, Ontario. These days she is busy writing her next novel, finishing her basement, and trying to stay in shape by running somewhat regularly.