It's difficult to imagine a harder first act to follow than The Kite Runner: a debut novel by an unknown writer about a country many readers knew little about that has gone on to have over four million copies in print worldwide. But when preview copies of Khaled Hosseini's second novel, A Thousand Splendid Suns, started circulating at Amazon.com, readers reacted with a unanimous enthusiasm that few of us could remember seeing before. As special as The Kite Runner was, those readers said, A Thousand Splendid Suns is more so, bringing Hosseini's compassionate storytelling and his sense of personal and national tragedy to a tale of two women that is weighted equally with despair and grave hope