On one hand, a story set in the XXVI century was in our galaxy, where the technological level is based on an evolution of the one we Contemporary, keeping specific to current theories limits: spaceships do not move faster than light (but very close to the speed), genetic and bionic changes are legion, software and merge biological viruses (precisely because of the grafted human technological implants), etc. And we discover a lot about astronomy and physics, the neutron stars, different effects of gravity, the red dwarf ...
All without that one has the impression of a scientific presentation, far from it! The story behind the novel is complex and in any case with an expected outcome, but the fact remains that one can not help turning page after page, so the action follows a rhythm and effreiné phases are nested.
I do not however put 5 stars because of some secondary characters a little too bland and lacking relief, although the main 3 - those we follow the internal point of view - are excellent. This is undoubtedly to read for fans of SF!