The Causal Angel
The spectacular follow-up to The Quantum Thief and The Fractal Prince — a high-velocity adventure in the post-human future
With his infectious love of storytelling in all its forms, his rich characterization and his unrivaled grasp of thrillingly bizarre cutting-edge science, Hannu Rajaniemi swiftly set a new benchmark for SF in the 21st century. Now, with his third novel, he completes the tale of the many lives, and minds, of gentleman rogue Jean de Flambeur.
Influenced as much by the fin de siècle novels of Maurice leBlanc as he is by the greats of SF, Rajaniemi weaves intricate, warm capers through dazzling science, extraordinary visions of a wild future,and deep conjectures on the nature of reality and story.
In The Causal Angel we will discover the ultimate fates of Jean, his employer Miele, the independently minded ship Perhonnen, and the rest of a fractured and diverse humanity flung throughout the solar system.
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Hannu Rajaniemi
Hannu Rajaniemi is a name that echoes through the corridors of modern science fiction, his stories weaving intricate plots with mind-bending ideas that challenge the very fabric of reality. Born in Finland, Rajaniemi’s deep love for speculative fiction was nurtured from an early age. As a child, he was captivated by the expansive worlds of science fiction and fantasy, and these early influences would go on to shape his distinct narrative voice.
What sets Rajaniemi apart in the world of science fiction is his ability to combine complex, high-concept ideas with deeply human emotions. His debut The Quantum Thief, the first book in the Jean le Flambeur series, dazzles with its intricate world-building, a universe where digital identities, memories, and post-human technologies collide. But Rajaniemi’s genius lies in how he uses these speculative elements to explore questions of identity, free will, and the nature of intelligence—questions that feel as relevant to our world as they do to his far-flung futures.
Jean le Flambeur
Also known as The Quantum Thief Trilogy.
The gentleman rogue Jean de Flambeur is part mind burglar, part confidence artist. He’s known throughout the Heterarchy for his amazing galactic exploits, like breaking into the vast Inner System of Zuesbrains. In the first book of Hannu Rajaniemi’s trilogy, The Quantum Thief, Jean Le Flambeur’s trapped inside the Dilemma Prison, and must wake up every morning to kill himself before his other self can kill him. Filled with mind-bending science, plus mediations on the nature of reality, these interstellar capers are reminiscent of Maurice Leblanc and the science fictional greats.
Jean le Flambeur consists of three books. The current recommended reading order for the series is provided below.
Reviews and Comments
I salute Rajaniemi for writing this series. Even though there are parts of the story I really don't understand (Some of the story's physics go sooo over my head), the journey with Jean de Flambeur has been truly worth of reading. Excellent scifi and intriguing tale!

