(From the publisher):
While vacationing at a lake, Nancy, Bess, and George have their eyes on first prize in the annual sand castle contest. They use special colored sand and carefully build the castle to look like the ones they researched at the library. If the girls win, they'll get their picture in the local paper and all the ice cream they can eat.
Original title: Sand Castle Mystery
Genre: Fiction→ Children & Young Adult→ Mystery