This chapter examines the role of the body, and its possible uses, in two recent techno thrillers by German author Tom Hillenbrand: Hologrammatica (2018) and Qube (2020). It explores the boundaries between humans and machines in a futurist/dystopian scenario that allows people to replace their organic brain with a digital “cogit” (a small quantum computer) and switch bodies at will. Theories of posthumanism and transhumanism serve as a backdrop to analyze relevant aspects of the novels and to consider ramifications of technologies that might be possible in the not so far future. It questions the role of artificial enhancements to bodies, of the connection between bodies and brains, and of fundamental concepts like identity, body, and humanity. A particular emphasis of the chapter will be placed on the role of gender. The interchangeability of bodies (i.e. vessels) in Hillenbrand’s techno thrillers invalidates clear gender distinctions, along with other physical characteristics. While moving beyond human limitations allows for a certain playfulness in transgressing boundaries, Hillenbrand’s novels fail to live up to the full spectrum of their possibilities. They do, however, allow readers to envision future constellations of non-binary ways of being, and of forming relationships that transcend traditional ideas. Lastly, the chapter examines the novels’ setting in a world that has been altered by severe environmental threats, and it investigates how the mind-body split impacts issues regarding crime, detection, and identity. The cautionary function of Hillenbrand’s texts thus urges us to consider future ramifications of current developments in regard to technology, culture, and environment.