The Guardian Hound. The Shadow Wars Trilogy, #2

How do you fight an opponent you can't touch? Namely, the shadows: An alien race, determined to suck the life out of everything on Earth before escaping to another planet. They have no form, no body to grasp or slay. They confuse the mind and steal the life force of everything they touch-person, animal, or plant. Their next opponent: Lukas, a five-year-old prince of the Hound clan, who can take the form of any hound, unlike most of his contemporaries, who only shapeshift into a single dog-like form. The shadows have infected the court of the hounds.
Can Lukas survive to adulthood? Then battle non-corporeal creatures and save the world? The Guardian Hound-the second book in The Shadow Wars Trilogy-uncovers new enemies as well as new allies. Be sure to read all three books, starting with The Raven and the Dancing Tiger as well as the final book, War Among the Crocodiles.