Super Fast, out of Control! (Marvin Redpost, No. 7)

Many have tried to master the slippery slopes of Suicide Hill on their bikes. Marvin's older brother has conquered the hill, but Marvin has steered clear. Until now. The word at school is that Marvin will be taking on the hill with his new mountain bike. But the truth is, he can barely climb on the seat! And the gears--forget about it. How did he suddenly become a daredevil? Does he have to go through with it to prove himself? If Marvin makes it, he'll be a hero. If not, his friends and family may catch the biggest wipeout in history!