The works sited here are really the work of (at least) two separate authors. The quilting books are the work of Nancy (J.) Martin (1943-present) while the Blackbird Sisters and Tyler series are the work of Nancy Martin (1953-present), who also has the pseudonym of Elissa Curry.
Split authors include:
# Nancy Martin, 1953- author of How to Murder a Millionaire
# Nancy Martin, 1899- author of Children's Bible Stories from the New Testament
# Nancy Martin, 1909-2003 (international educationalist), author of Whatever It Takes
# Nancy (J.) Martin, 1943- author of Comforts and Quilts
# Nancy Martin, 1939- author of Vanilla Blood