Starting with the 1628 discovery that the heart pumps blood through the body and ending with today’s advances in cardiovascular medicine, this nonfiction selection highlights many major medical breakthroughs. Each page is dedicated to a new discovery, including period illustrations, explanations of the discovery, as well as a “What Happened Next” to explain how each discovery impacted the world. The text is written in present tense, so the reader almost feels as if he/she is reading a news report from the time. This style also makes reading easier and more interesting.