The Circus Dogs of Prague — Rachelle Delaney

JR and his embassy friends Robert, Pie, and Beatrix are on their way to Prague! Having solved the mystery of the missing dogs in Moscow, JR is ready for a vacatio with his human, George, and George's Russian girlfriend, Nadya. And where better to distract themselves than in Prague, taking in the sights and meeting Nadya's brother, a circus performer.
But something is amiss at the circus -- the animals are unhappy. The boxing kangaroo doesn't want to box, the dancing chimpanzee doesn't want to dance. Not only that, but a fancy new circus is coming to town, threatening to put everyone out of a job. It's up to JR and the embassy dogs to save the show, with the help of some unlikely accomplices.