The first novel in the Dana Girls Mystery Stories by Carolyn Keene, a pen name used by a variety of authors who wrote the beloved Nancy Drew Mystery Stories. Jean and Louise Dana, are teenage sisters and amateur detectives who solve mysteries while at boarding school. Bound in bright purple cloth with black stamped circle containing silhouettes of the Dana Girls with chain and black lettering, bumped at spine ends. Illustrative pink and green DJ; faded with chipping along edges, closed tears, and blemish in upper right corner where sticker was removed. DJ in mylar. With illustrated green endpapers and top edge stained green. Illustrations by Ferdinand E. Warren.