After being informed that she has five aunts living in various places, Harriet Bean uses her detective skills to track them all down and soon discovers that she has a sixth, Aunt Formica, who is a real cowgirl with a serious cattle ranch mystery that needs to be solved.When she joins Aunt Japonica and Aunt Thessalonika on a trip to America, nine-year-old Harriet meets yet another relative--Aunt Formica, a cowgirl who is having trouble with some clever and mysterious cattle rustlers.
