"Convincing construction tycoon Conrad Wright that his wealthy grandmother needed anything was a formidable task. But Marnie finally made him see that his grandmother was lonely. Convincing Conrad that she, Marnie Hamilton, schoolteacher, was not the person to supply the companionship proved impossible. Marnie agreed to the job for the summer. Living with Eva Wright, however, meant living with Conrad too. And though she knew it seemed hopeless, particularly with the beautiful Helena around, Marnie just couldn't help falling in love!" This is from the back cover of this book.
Used availability for Rosemary Badger's A Matter of Marnie
February 1986 : UK Paperback
September 1985 : UK Paperback