At head of title: Gertrude Chandler Warner's The Boxcar children.
"Graphic Planet"--Copyright page.
"The Aldens are spending sunny days at the shore and summer nights in a mobile home right on the beach! One morning, Benny finds a gold necklace in the sand. Soon a search for its owner begins, and a trail of clues leads the children to Tower House. What will the boxcar children find in the strange old mansion?"--Page 4 of cover.