The Clubhouse Mystery

Cass and her best friends, Lex and Nicholas, are the Bubble Street Gang. They investigate crimes, solve mysteries and have brilliant adventures. They've even got their own secret clubhouse. After the annoying baby twins demolish the fort Cass has built in the sitting room, she has the great idea of building a proper fort – outdoors – that can be the Bubble Street Gang's clubhouse. Lex's granny sug...