Gus and Gertie have left home once again, and this time to join the Olympic games. Both are dressed in their flowered swimming caps and are ready to join the games. Well, Gertie is anyway. But Gertie's lucky charm goes missing, along with the other athletes good luck charms. Gus and Gertie must figure out who stole them.This is the second book in the series and it was just as fun as the first.