In Slowdown at Sears Point, Orly Mann and his veteran crew face tough competition at the circuit's most difficult road race. When Doug Prescott, a junior member of Orly's team, meets die-hard racing fan Paolo Pellegrini, their mutual love of racing forges a friendship that goes beyond their racial differences. Together Doug and Paolo have the most exciting summer of their lives as they solve a mystery and cheer Orly on in the race of his life.

Doubt at Daytona rejoins Doug and Paolo at NASCAR's most prestigious race, the Daytona 500. Orly's crew, which now includes Paolo, must be at their fastest for the fiercely competitive qualifying race. Their encounters with fifteen-year-old Juan-Jesus add a volatile element to the tensest contest the team has ever faced.