Why do so many of us have trouble falling asleep? Why do our thoughts spin in wild directions after dark? More important: why do we dream? In this groundbreaking new book, investigative journalist and anthropologist Scott Carney sets out to discover how the sleeping world reverberates in the waking one. Unlock the power of the immune system at the same time you dig deeply into the source of creativity. Discover the evolutionary process that forges both memory and emotions. Equal parts cutting edge neuroscience and ancient wisdom, this short and elegant book leads to the inescapable conclusion that we are what we dream.