Diana Hacker personally class-tested her handbooks with nearly four thousand students over thirty-five years at Prince George s Community College in Maryland, where she was a member of the English faculty. Hacker handbooks, built on innovation and on a keen understanding of the challenges facing student writers, are the most widely adopted in America. Hacker handbooks, all published by Bedford/St. Martin s, include The Bedford Handbook, Ninth Edition (2014); A Writer s Reference, Eighth Edition (2015); Rules for Writers, Eighth Edition (2016); and A Pocket Style Manual, Seventh Edition (2015).Nancy Sommers, who has taught composition and directed composition programs for thirty years, now teaches writing and mentors new writing teachers at Harvard s Graduate School of Education. She led Harvard s Expository Writing Program for twenty years, directing the first-year writing program and establishing Harvard s WAC program. A two-time Braddock Award winner, Sommers is well known for her research and publications on student writing. Her articles "Revision Strategies of Student and Experienced Writers" and "Responding to Student Writing" are two of the most widely read and anthologized articles in the field of composition. Her recent work involves a longitudinal study of college writing to understand the role writing plays in undergraduate education. Sommers is the lead author on Hacker handbooks, all published by Bedford/St. Martin s, and is coauthor of Fields of Reading, Tenth Edition (2013)."