"To be and not be"

Young talented mathematician, Saint-Menoux sees his life turned upside down (in all senses of the word) by his encounter with a crippled chemist that has developed a revolutionary way to travel through time and load Saint-Menoux, the Research is at the origin of his find, to travel through time, to observe the evolution of man and understand why it is street if inevitably to its destruction. The two scientists will constantly find a way to bring happiness to mankind ...
If the theme of time travel has been revisited many times, both in literature and films, the novel Barjavel surprises with its undeniably precursor side. Indeed, all the issues raised by this discovery, particularly of fate or destiny, are present in the complete novel, intelligent and subtle, written in 1944. The imaginative talent equal novelist its ability to involve the reader in his thoughts, as they are paradoxical, and adds to the genius of the storyteller.
A good science fiction book.