America's favorite young sleuth continues his war on crime in these ten baffling cases. Mystery fans are invited to match wits with Encyclopedia Brown as he tracks down the clues and solves the puzzles.

Leroy Brown, better known as Encyclopedia, is the ten-year-old son of the police chief of Idaville. Whenever Mr. Brown has a particularly difficult case, he brings it home for his son to deal with. A missing ambassador to Latin America, the case of Smelly Nellie and the ambergris, a client who wants to pay with an 1861 Confederate silver half-dollar (worth around $5000)--these and seven more puzzling cases keep Encyclopedia Brown busy.

As in the other books in this series, the solutions to the mysteries are printed in a separate section in the back of the book.