Mark Lester is an experienced grammarian, ESL expert, and professor emeritus of Eastern Washington University. He was the founding chairperson of the ESL department at the University of Hawaii, considered one of the best ESL programs in the United States. He is the author of more than a dozen books, including Grammar and Usage in the Classroom, one of the most widely used college grammar textbooks in the country. For McGraw-Hill Professional, he authored McGraw-Hill's Essential ESL Grammar and with Larry Beason he coauthored The McGraw-Hill Handbook of English Grammar and Usage. Dr. Lester obtained his BA in philosophy and English literature at Pomona College and his PhD in Linguistics from University of California-Berkeley. He also holds an MBA from the University of Hawaii.

Daniel Franklin and Terry Yokota are the producers of McGraw-Hill's Big Book of Verbs series and are experts at creating effective language acquisition texts--editing and authoring references, grammars, and textbooks for learners of Chinese, English, French, Italian, Latin, German, Polish, Russian, and Spanish. Franklin obtained a BA in Latin at Eastern Illinois University and did graduate work in linguistics at Harvard University. Yokota obtained a BA and MA in Spanish language and literature at Washington University in St. Louis.