One of two children’s books that appears in the movie I am Sam (2001) is entitled Green Eggs and Ham. It was written in 1969 by Dr. Seuss (the pseudonym of Theodor Seuss Geisel), a prominent American writer for children. Although he is not well-known in Japan, he is a legend in the U.S. and other English-speaking countries. Green Eggs and Ham begins with “I am Sam,” from which the film takes its title. This paper first looks at the important role that the book plays in the movie. Dr. Seuss’ influence, however, extends beyond the movie and has led to literacy campaigns in the U.S.