What there is of great here is that, starting from a scenario in the air at any priori the author develops a story of the most amazing. Indeed, in this work, Stefan Wul launches full time paradox and it will take the fall for all counties elements fall into place. This is great.
Stefan Wul opens his story with a quote from Arthur C. Clarke: The further we go, the faster the time passes slowly. At the speed of light, time ceases to exist; the moment "now" lasts forever.
I must say that this story, very pleasant to read, was also very well suited cartoon by René Laloux under the title "The Masters of Time". So whether you choose to read the novel by Stefan Wul, or prefer to watch the movie, is finally equal. Both are well: the story is more or less the same, although in the film there is some small changes to the original story. The book may be sweeter, because in the film, the scene where the boy is attacked by hornets is downright brutal (seen through the eyes of a child).
Finally, Stefan Wul gives us here a key science fiction novel for fans of the genre, in which he plays with time and events, all tinged with poetry and ending on a beautiful spatiotemporal bombshell .