"The Corner House Girls at School" is a book by Grace Brooks Hill. This story is part of the "Corner House Girls" series, a popular series of girls' adventure books from the early 20th century. In this book, the Corner House Girls, a group of young girls, venture into the world of school. They experience the ups and downs of school life, make new friends, and encounter various adventures and mysteries along the way. Like other books in the series, this story likely emphasizes themes of friendship, teamwork, problem-solving, and the excitement of unexpected discoveries. Overall, "The Corner House Girls at School" is a classic children's book that combines elements of school life, adventure, and the close bonds of friendship among a group of young girls as they face new challenges together.