In 1980, Lou published his first book entitled The Kitchen Quarterback through Parkin Printing. The book is subtitled Basics for the Beginning Football Fan.
In 1989, Lou published his second book entitled The Fighting Spirit: A Championship Season at Notre Dame through Simon & Schuster. The book was written with John Heisler.
In 1998, Lou published his third book entitled Winning Every Day through Collins Business. The book is subtitled The Game Plan for Success.
In 2006, Lou published his fourth book entitled Wins, Losses, and Lessons: An Autobiography through William Morrow.
In 2007, Lou published his fifth book entitled A Teen's Game Plan for Life through Sorin Books.