Nancy Drew #7 THE CLUE IN THE DIARY is a vintage hardcover book published by Grosset & Dunlap in 1932. Written by Carolyn Keene, it is a children's mystery and thriller novel featuring the character Nancy Drew. The book is an original edition and is written in English. It is part of the Nancy Drew series and is the seventh book in the series. The book is not signed or personalized and is a single unit.