Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage. Everyone loves a good pizza! But where did pizza begin? Is it good for us? Learn all about one of our favorite foods. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 1804. Lexile Reading Level: 700L.