Book excerpt: This book surveys the distinctions that underlie the unbound potential and existential risks of life expansion and radical modifications posed by a transhuman world. Humanness is in flux as human bodies are being hacked and altered in their quest for super wellness, super intelligence and super longevity. Now is the time to discuss how best to think about dealing with bodies that have been hacked to exceed natural physical limits or more technically, species typical functioning. Enter the advent of transhumanism to take uncertainty by the horns. According to transhumanists, death is unnecessary and medical conventions undermine the possibility to radically evolve. To biohackers, there is no need to wait to explore the risks that conventional medicine dares not. This book is of interest to anyone interested in tapping into this growing movement of modifying the human body as it is right now.