To fetch a thief

"Chet has smelled a lot of unusual things in his years as trusted companion and partner to P.I. Bernie Little, but nothing has prepared him for the exotic scents he encounters when an old-fashioned traveling circus comes to town. The only problem is that Peanut, the headlining pachyderm has gone missing - along with her trainer. Popo the Clown hires the Little Detective agency to find out what has become of the duo, sending Chet and Bernie south of the border in hot persuit of some dangerously cool criminals and a decidedly uncooperative pachyderm"--Page 2 of cover.