Six New Yorkers are sick with a mysterious virus that attacks the brain. Experts suspect a tiny culprit: mosquitoes Then birds start dropping dead. Scientists think that the outbreaks are related. But how?High-interest topics, real stories, engaging design, and astonishing photos are the building blocks of the XBooks, a new series of books designed to engage and motivate reluctant and enthusiastic readers alike. How can a bite from a pet prairie...