David Keheand Peggy Dustin Kehe, authors of The Grammar Review Book, have co-written eight textbooks with Pro Lingua Learning. They have been ESL teachers for over 35 years in the U.S., Japan, and Greece and with the Peace Corps in Niger. They both have a Master of Arts in TESOL from the School for International Training (SIT) in Brattleboro, Vermont. Currently, David is Faculty Emeritus at Whatcom Community College, Bellingham, WA, and Peggy is retired from teaching. David also writes a blog called "Common Sense Teaching ESL."