Everyone says that Crooked Hill has a curse. But it's the only good place to go mountain biking in Flatte County. When Jonah's brother goes down it during a storm, can Jonah beat the Crooked Hill curse?

Nelson Greenwood loves drawing superheroes, particularly the hero of his own comic book, Major Speed, modeled on Nelson's twin brother Nick, a skilled BMX rider--but when a crash knocks Nick out of a competition, and he suggests that Nelson take his place, Nelson is not sure he can summon the skills of Major Speed and compete against the best BMX riders, particularly Nick's nemesis, Cain Otto.

Thirteen-year-old Kaleb has always looked up to his older stepbrother, Luke, in snowboarding and everything else, so when Luke is wounded in Afghanistan Kaleb is devastated--and to honor his brother he is set on competing on the difficult slopestyle course.

Jason never turns down a dare, which has gotten him in trouble more than once. After he gives some classmates a hard time, they challenge him to a BMX competition. Jason can't say no. But BMX is way harder than he thought. If he can't learn to ride before the competition, this dare will be his last.

Mason finds out that football in his new town of Clearwater is nothing like where he came from.

Sam is the best swimmer on his school swim team. When Julien, a new exchange student at school, joins the team near the end of the season, Sam offers to help him practice. But when Sam and Julien have to race against each other in the final meet, only one swimmer can win the gold.

Nick hates running, but his high school gym teacher thinks he is just the right person to fill in for the two hundred meter relay race, and will not give him a passing grade unless he tries--will Nick learn to run or let the team down?