Samuel Langhorne Clemens, known by his pen name Mark Twain, was an American writer, humorist, entrepreneur, publisher, and lecturer. His novels include The Adventures of Tom Sawyer and its sequel,
Ricardo AntunesRicardo Antunes is Professor of Sociology at University of Campinas (UNICAMP/Brazil). He was Visiting Research Fellow at Sussex University and his books and articles has been published in France, Ita
Sehdev Kumar is Professor Emeritus of Environmental Studies at the University of Waterloo, Canada.