Tone of lightness to seriousness of life, or vice versa

Addressing a Goncourt is always biased, we expect some conveniences. Alabama song gives voice to the forgotten Fitzgerald revives the Belle Epoque and its reverse, the artist and the Paris-war between light and carefree. Everything is in emotions, a pastel pallet sometimes pungent others, the author takes us into the freedom of a personality who dreamed of glory, the insolent freedom, which dims our "freedom" modern, but always the risk of madness. A beautiful story, quickly read, but what remains there then? And then, is it a Goncourt?