In this powerful, short memoir, Junger describes his experience in 2020, when he suffered a ruptured pancreatic aneurism, which he shouldn't have survived. As he slipped away, he was visited by his dead father, who invited Junger to join him. He then returned to life, but was then spurred to explore scientifically, philosophically and personally the meaning and events around mortality and death, and how we might understand an afterlife from a physicists perspective. It's a mind-stretching book, which takes in sub-atomic physics, the Big Bang and the size of the universe, consciousness and chance. It's a brilliant read.