We hope you read fast, because this book completely goes blank two months after you open it and expose it to sunlight and air. An ad agency called Draftcb recently won a gold medal award at the Cannes PR Lions for its innovative and intriguing publishing idea. The concept, created for Argentine publishing house Eterna Cadencia, is called El Libro Que No Puede Esperar — translated, it means The Book That Can't Wait.