Ruffles and Danny, or the Responsibilty of Ruffles - Margery Watson

A nice little story about a widower, his 18-year-old daughter and 5-year-old son, and their vacation from their home in Colorado to the shores of Cape Cod, Massachusetts. There they meet some friendly locals, and... the story continues.
The reader picked up this book at a thrift store, saw it was out of copyright, and recorded it "sight unseen". It was worth the risk. (Summary by TriciaG)