Child psychiatrist Lynne Jones tells us why she believes some children who lived through the Bosnian war in the 1990s do not show lasting signs of trauma from the conflict. Then, Jeffrey Kluger reminds us of how terrifying the prospect of polio once was, in the days before a vaccine was found. He traces the epic struggle and success of the efforts to beat the disease in his new book, Splendid Solution: Jonas Salk and the Conquest of Polio. Carlos Ruiz Zafón's novel, The Shadow of the Wind, has spent more than a year on the Spanish bestseller list. Set in postwar Barcelona in 1945, the book follows a boy's search for more information about a little-known author he discovers. As his search takes him through the city, the boy begins to realize the power, and in this case the danger, of literature. Finally, Stephen Yafa traces the threads of cotton's political and economic influence in world history: Big Cotton.