It’s a big question-are parasites friends or enemies? From tiny organisms to fleas, ticks, and huge plants, parasites can have a huge impact on the animals and habitats around them, but are they more helpful or harmful? Discover microscopic parasites feeding off hosts without them knowing, parasites that boost the immune system, the technology helping scientists understand these organisms, and more! Beautifully bound with stunning illustrations, part of a unique, collectable series that will start a lifelong interest in science. With QR code links to The Big Question Answered website for comprehensive free teacher resources, kids’ activities, and more!