Diana Hacker (1942-2004) taught English Composition and tutored in the writing center at Prince George’s Community College for 35 years. During her years at PGCC, she personally class-tested her handbooks with nearly four thousand students. First and foremost a teacher, she was clear about why her handbooks work: They give students practical solutions to real writing problems. Hacker handbooks, used at almost half of the colleges and universities in the country, are the most widely adopted in America. Diana Hacker’s handbooks include A Writer’s Reference, Rules for Writers, A Pocket Style Manual, and The Bedford Handbook. The list of innovations that first appeared in a Hacker handbook is impressive: hand-edited sentences, grammar-checker boxes, an index with student-friendly terms, a special section on ESL issues, coverage of document design, and discipline-specific research advice.