Forbidden game - Blackman Malorie

Shaun has Sickle Cell Anaemia and he has to work hard to persuade his parents to let him go on a school trip to Scotland. He almost regrets going when he finds himself in a group with three bullies. During a forest trek, Shaun's team take a short-cut in order to beat the rest of the class, and are soon lost. Martin, one of the bullies, falls into a fast-flowing river and Shaun proves himself by plunging in and saving his life. The coldness of the river causes a Sickle Cell crisis which lands him in hospital. Martin is in the next bed and they eventually become friends.