Good prose, but unequal

I appreciated the prose of the author succeeds, become extraordinary thing now in the small world of French literature, to align sentences of more than two lines by mobilizing a vocabulary rich enough to give the reader the impression of reading anything but a beach novel. Some passages are quite funny, others very sad, and it is ultimately the dominant impression. My disappointment was clear that arrived at two thirds of the book, the author loses the original idea and no longer sporadically mention the social and political context, unrelated to the action. The meeting with Mitterrand mark the cut by making the hero an actor rather than a spectator of our world, which definitely breaks the mood.