This book describes Peter's reaction to the birth of his baby sister whose presence
seems to threaten his identity as a family member. He tries to hide his favorite chair
from his parents, who he fears want to paint it pink for the newborn, only to realize
that he no longer can fit into it. It was at this point that Keats also realized that
Peter was growing up.
Peter's Chair, written five years after the character first appeared in The Snowy Day, is one of five stories that highlight Peter's adventures. Keats used his familiar bright color collage combined with paint for these endearing illustrations.