Spencer Johnson, M.D., is one of the world’s most respected thinkers and beloved authors.

His eleven international bestselling books include the #1 titles Who Moved My Cheese?® An A-Mazing Way to Deal with Change, the most widely read book on change, and The One Minute Manager®, the world’s most popular management method for over two decades, coauthored with Kenneth Blanchard.

Dr. Johnson is often referred to as “the best there is at taking complex subjects and presenting simple solutions that work.”

He recieved a B.A. degree in Psychology from the University of Southern California, an M.D. degree from the Royal College of Surgeons, and performed medical clerkships at the Mayo Clinic and the Harvard Medical School.

He has served as Leadership Fellow at the Harvard Business School, and is currently Advisor to the Center For Public Leadership at Harvard’s John F. Kennedy School of Government.

His work has captured the attention of major media, including the Associated Press, the BBC, CNN, Fortune, the New York Times, the Today show, Time magazine, USA Today, and United Press International.

More than forty-six million copies of Spencer Johnson's books are in print worldwide in more than forty-seven languages.

Dan Andreasen is the illustrator of numerous picture books, including By the Dawn’s Early Light: The Story of the Star-Spangled Banner by Steven Kroll, which was named an ABA Kids’ Pick of the Lists and a Notable Children’s Trade Book in the Field of Social Studies; A Quiet Place by Douglas Wood; and Sailor Boy Jig by Margaret Wise Brown. He has also authored several picture books, including With a Little Help from Daddy and A Special Day for Mommy. Dan lives with his family in Medina, Ohio.