The book "Trans- and Posthumanism" by Janina Loh offers a comprehensive and critical examination of the theories that deal with the perfection of humanity and the overcoming of mortality. Loh highlights the currents of transhumanism and posthumanism and presents the central approaches. The challenges associated with human enhancement technologies, the merging of humans and machines, and the evolution or abandonment of humanism are discussed. The author also addresses the development of artificial superintelligence and the transfer of the human mind to computers. Additionally, the questioning of traditional categories such as nature/culture and subject/object is explored, prompting a profound reflection on the future of being human.