Will they solve this medical mystery in time? When Bo Salisbury hurts his ankle playing soccer, doctors think it\'s a bad bruise.
How can a bite from a pet prairie dog cause a life-threatening illness? Where does the guinea worm, a par.
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.
Soon his leg gets worse, and he feels very sick.
Will they solve this medical mystery in time? When Bo Salisbury hurts his ankle playing soccer, doctors think it\'s a bad bruise