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. Doctors today don't use leeches. Long ago, there were no big drug companies. But acupuncture, an ancient practice, is still helping people. Follow how medicine has - and has not - changed over time. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the reader!.