Tacy's World is a fictional universe created by author Maud Hart Lovelace. It centers around the life of a young girl named Tacy, who navigates her childhood experiences in the early 20th century. The stories capture the essence of friendship, family, and the adventures of growing up in a small town. The series is set in the fictional town of Deep Valley, which is inspired by Lovelace's own hometown of Mankato, Minnesota. Through Tacy's eyes, readers explore themes of imagination, community, and the joys and challenges of youth, making it a beloved classic for children and adults alike.