"Eloise" is a children's book series created by author Kay Thompson and illustrated by Hilary Knight. The first book, published in 1955, introduces readers to a spirited young girl who lives in the Plaza Hotel in New York City. Eloise is known for her adventurous spirit, playful antics, and her love for exploring the hotel and its surroundings. The character of Eloise has become iconic, representing childhood curiosity and independence. The series has expanded to include several sequels, merchandise, and adaptations, including a live-action film. Eloise's charm continues to resonate with children and adults alike, making her a beloved figure in children's literature.