The Quantum Thief

This is book 1 of the Jean Le Flambeur trilogy by Hannu Rajaniemi.

Flambeur was the character known as Lupin, The Gentleman Thief, in books from about 1900. His character has been used in movies, even by Japan's Ghibli Studios, and a French miniseries on SBS a few years ago. He's a mysterious master of disguise character who keeps bobbing up and stealing very valuable things, while simultaneously solving crimes for the police. In this series, Rajaniemi has thrown him into the far post-human future where consciousness is uploaded into software and people live in multiple bodies enhanced by nanobots etc. It's very hard SciFi that almost demands a level 11 on the Mohs Scale.

Rajaniemi is relentless in writing a riveting story in a distant and strange setting but all the while giving absolutely no information on what his tech language means. You either keep up or you get left behind. It's reminiscent of Charles Stross but with much better prose. At about the 30% mark of the first book I was starting to get the hang of it and by the end I was charged up enough to go straight into the second one, and then the third.

The first line of the book: "As always, before the warmind and I shoot each other, I try to make small talk." And the mystery of what this means keeps up through the whole book.