- Remember Love (2006)
- Beneath a Blood Red Sky (2008)
- The Promise (2008)
- The Refuge (2009)
- The Storm (2010)
- Beyond the Shadows (2011)
- In the Stillness of the Night (2013)
- Dawn's Light (2014)
- The Color of Grace (2015)
- The Measure of Mercy (2016)
In addition to her fiction, Martha has also written several nonfiction books, including:
- Faith, Trust, and Prayer: A Guide to Developing a Personal Relationship with God (1999)
- Finding Hope in the Midst of Suffering (2002)
- Overcoming Life's Challenges with God's Help (2010)
- The Power of Prayer: True Stories of Answered Prayers (2012)
Martha's books have been translated into several languages and have been enjoyed by readers around the world. She lives with her husband in Michigan.