What is the author's style in The Unexpected Mrs. Pollifax by Dorothy Gilman?

The overall tone of the book is one of hope though this hope is shrouded in danger and suspense. It must be noted that the book was copyrighted in 1966. The story reflects this rather old-fashioned writing style. The book is written in a straight-forward manner though there are words and phrases that are typical of the time and may be unfamiliar to some readers. The author uses several literary devices, including the effort to misdirect and foreshadow.