"Peter's Chair" is a children's book written by Ezra Jack Keats. It tells the story of a young boy named Peter who is adjusting to the arrival of a new baby sister. As he navigates his feelings of jealousy and change, he discovers that his favorite chair is being repurposed for the baby. Throughout the story, Peter learns to embrace his new role as an older brother. The book beautifully illustrates themes of family, growth, and acceptance, making it relatable for young readers experiencing similar changes in their lives.