Clifford The Big Red Dog is an America children's book series written by Norman Bridwell that was first published in 1963.

Clifford was the runt of the litter and was chosen by Emily Elizabeth as a birthday present. No one really expected Clifford to grow but Emily's love for her tiny red puppy continued to grow and Clifford grew with it. When Clifford reached 25 feet tall Emily's family had to leave their home in the city and move to the open spaces of Birdwell Island.