ABE has a box set
The Chalet School Box Set Five Adventures at the Famous School
The coming of age of the Chalet School, The Chalet School and Jo, The Princess of the Chalet School, A Problem for the Chalet School, The Chalet School and the Island
Picture on one side- is the front covers of all five, and other side is The Chalet School. If link works you can see all the pictures -
https://www.abebooks.co.uk/servlet/Book ... id=1&pid=5and another
The Chalet School Box set: Chalet Girls in Camp, Three go to the Chalet School, The wrong Chalet School, Eustacia Goes to the Chalet School, Excitements at the Chalet School
https://www.abebooks.co.uk/servlet/Book ... brent-dyer