La profec?a oscura / Riordan, Rick

In the second trial, Apollo/Lester must travel to the American Midwest in order to find the most dangerous Oracle before the second member of the evil Triumvirate does. Along the way Apollo will learn more about friendship as he travels with Calypso, Festus, and Leo.

"Leaving the safety of the demigod training ground, a disgraced Apollo embarks on a quest across North America to find a dangerous ancient-world Oracle while navigating the challenges of the evil Triumvirate"--OCLC.