A title that speaks, complex characters, a plot that bothers us ... As vacuum, Sebastien Tessier draws us into the meanders of a sick brain but so exciting. Scientists precisions, the depth of character and originality of the plot make this unique scientific thriller of a kind! Thank you has this writer whom I wish much success and why not a cinematographic adaptation of his work ... Succumb to the appeal of X, and are betting that your mind will find the respite that once the last page COMPLETED!