Résumé de The causal angel

"The Causal Angel" by Hannu Rajaniemi is the final installment in the Quantum Thief trilogy, exploring themes of identity, consciousness, and the implications of advanced technology set in a richly constructed future. The narrative continues to follow Jean le Flambeur, a master thief, and Mieli, an augmented human with wings, as they navigate the complexities of a post-singularity society. The setting incorporates various imaginative elements, including the complex, sprawling metropolis of Mars, known as the Spire, which is governed by descendants of the Zoku, a post-human culture that has emerged after significant technological advancements. In this concluding volume, Rajaniemi introduces the concept of the “causal angel,” a being that can manipulate reality and minds, reflecting on the interplay between free will and determinism. The book delves into competing narratives surrounding the nature of existence and consciousness, framed by the idea of "the lost nodes," which are lost memories and identities in a world dominated by simulation and divergence. The story weaves through different layers of reality, where characters confront their pasts and the implications of their choices in an environment where technology has blurred the lines between life and simulation. As the protagonists work towards achieving their goals, they engage in various experiments related to time manipulation and identity reconstruction, thus challenging their own realities. The book examines how they grapple with living in a world of pervasive surveillance and augmented realities, questioning the essence of what it means to be human in a future where technology reshapes their understanding of self. "The Causal Angel" stands as a profound exploration of technological innovation, agency, and the moral implications inherent in advanced computational realities.