Well, I guess I shouldn't pay real money for it - but it sounds delightful and it's not in CLAN.

Summary from cover: How Cathy has always longed for a room of her own! And now it looks as if her dream will come true. For he leonard family is moving to a big house, with a room for Cathy. A room she doesn't have to share with her younger brother and sister. Suddenly the blow falls. Cathy's room must be rented to save money. She is heartbroken...until she meets the wonderful Hughes family. Then Cathy learns that it takes a big heart to live in a big house.