Stippled with French words and phrases, even working its way up to whole sentences, this bi-lingual (i.e. British-French) mystery story will also serve as a quick tour of Paris. When Daddy is posted to the embassy in Paris, Roy, Judy and Linda are all fascinated by the crumbling house vis a vis, its occupants and their traffic in packages and messages. They also become friends with Gino who takes a room there, and then disappears, and they energetically pursue his whereabouts and press their case with the prefecture. Not wizard by any means; but adequate.