To the unaccustomed eye, a man toting 120 books while riding a stubborn donkey would seem nothing short of a circus spectacle. But for hundreds of children in the rural villages of Colombia, Luis Soriano is far from a clown. He is a man with a mission to save rural children from illiteracy. There was a time when many people thought that I was going crazy, said Soriano, a native of La Gloria, Colombia. They 'd yell, Carnival season is over.... Now I 've overcome that. Soriano, 38, is a primary school teacher who spends his free time operating a biblioburro, a mobile library on donkeys that offers reading education for hundreds of children living in what he describes as abandoned regions in the Colombian state of Magdalena. In -LSB- rural -RSB- regions, a child must walk or ride a donkey for up to 40 minutes to reach the closest schools, Soriano said. The children have very few opportunities to go to secondary school.... There are -LSB- few -RSB- teachers that would like to teach in the countryside. Do you know a hero ? Nominations are open for 2010 CNN Heroes At the start of his 17-year teaching career, Soriano realized that some students were having difficulty not just learning, but finishing their homework assignments. Most of the students falling behind lived in rural villages, where illiterate parents and lack of access to books prevented them from completing their