Bok: Extreme Race. Author: Jane A. C. West

I have read Extreme Race and its exciting and fun to read, Its about two guys named Mark and Ben, they were entering the extreme marathon, they need to cross the Sahara desert in Africa beacuse Ben's twin sister named Belle was very ill, she had cystic fibrosis ( her lungs did not work properly), the reason they are in the race is beacuse they want to win so they can rase money for Belle's hospice.