Tires squeal as you watch a car speed from 0 to 100 miles per hour in less than four seconds. Intense! Machines puts the reader in the driverÕs seat of some of the fastest, largest, and most powerful machines on earth. --Spectrum(R) Readers are the perfect Common Core aligned tool to support the development of nonfiction reading skills crucial to a young readerÕs success. Each leveled reader features high-interest informational content, exciting full-color photo illustrations and Common Core aligned comprehension practice focused on the development of critical thinking skills. This multilevel series is the perfect addition to any library at school or home.