The kangaroos have escaped! This secret code message spells trouble for Brains Benton and Jimmy Carson and leads them down a trail that involves a circus clown, a real live performing elephant, a fortune-teller, a tightrope walker, and a very pesky parrot. All clues seem to point toward a secret message which could bring the boys' new friend Skeets Fenton into his proper inheritance, and unmask the villains as well!

Teen-age detectives Barclay ("Brains") Benton and Jimmy ("Operative Three") Carson match wits with a ring of rare-coin counterfeiters and track them to their hideout in the woods.

Brains Benton mystery # 3

When a snow-white vintage Rolls-Royce chases Jimmy Carson down the driveway of the Willoughby estate all by itself - well, as Jimmy would say, "Creeps!" But that's only the beginning: A strange hit-and-run accident, two quarts of sour cream, and a missing moustache start the incomparable Brains Benton and his partner Jimmy off on a truly international mystery as a kingdom hangs in the balance.

Brains Benton mystery #5

Brains Benton mystery # 6 A moving statue, a suddenly empty swimming pool, a terrifying painted dragon—all clues proclaim this the most difficult and dangerous case Barclay ("Brains") Benton and Jimmy (Operative Three") Carson have ever handled. The young detectives and their friend Mikko soon discover that the villains are the deadly variety, who will stop at nothing to get what they want.