As of my knowledge cutoff date in March 2023, Dorothy M. Kennedy is an editor best known for co-authoring several influential textbooks in the field of rhetoric and composition. She worked closely with co-authors Jane E. Aaron and Marcia F. Muth on popular writing guides such as "The Bedford Reader," "The Bedford Guide for College Writers," and "The Brief Bedford Reader." Kennedy's work often focuses on teaching effective writing skills to college students, including how to analyze texts, construct arguments, and develop clear, persuasive writing. Her textbooks are widely used in English composition courses across the United States and are appreciated for their accessibility and practical approach to teaching writing. Dorothy M. Kennedy's texts combine readings from a diverse range of authors with comprehensive instruction on writing processes and strategies, making them valuable resources for both students and instructors. However, given that there may be multiple authors with similar names, it is always possible that there are other individuals named Dorothy M. Kennedy with different professional backgrounds.