A riveting journey into the Amazonia in search of a lost civilization. Over 800,000 copies sold by the so called 'Queen of the Spanish Adventure Fiction', one of the top writers in Spanish language, and author of the bestseller The Last Cato. A strange disease has left Arnau's brother in a vegetative state. A hacker and computer businessman, Arnau Queralt undertakes an archeological research in order to find the cure for his brother's illness. Surprisingly, Arnau finds himself immersed in an exciting adventure that takes him to the Inca Empire, the ruins of Tiwanacu and the Amazon rainforest, following the trace of a lost civilization. Arnau and his friends, Marc and Lola, take the readers on a journey through knowledge, unearthing some of the uncovered mysteries of Humanity, the paradox of the Evolution Theory and the truth about the role Spanish Conquistadors really played in the Spanish colonization of the Americas. A fascinating novel that challenges the readers to take part in a guessing game, and whose key lies in discovering the power of words.