Charles Graeber, New York Times bestselling author of The Good Nurse, details the astonishing scientific discovery of the code to unleashing the human immune system to fight — and possibly even cure — cancer.

For decades, scientists have puzzled over one of medicine’s most confounding mysteries: Why doesn’t our immune system recognize and fight cancer the way it does other diseases, like the common cold?

As it turns out, the answer to that question can be traced to a series of tricks that cancer has developed to turn off normal immune responses-tricks that scientists have only recently discovered and learned to defeat. The result is what many are calling cancer’s “penicillin moment,” a revolutionary discovery in our understanding of cancer and how to beat it.