Twelve-year-old AZ dreams of becoming the world's greatest explorer. Instead, he's stuck in summer school with just Odd Uncle Arthur for company. Little does AZ know that this summer will be his most thrilling--and dangerous--adventure yet. After a time-traveling mishap, AZ finds himself in Ophir, a lost city full of wonder, secrets . . . and cursed tombs. AZ must rely on his new friends and his gut to get him home. But first, he must summon the courage to guard magic artifacts from a repulsive villain. Will blood-thirsty crocodiles, turbulent rapids, and a stomach-churning feast stand in his way? Or does he have what it takes to join the Alliance of World Explorers?