The images of Nuit optimale were made between September 2004 and May 2005, at night and in an urban setting. The photographer recorded sources of artificial light, oscillating between a distant echo of descriptive realism and the borders of abstraction through a constant denial of focus. As in Mémoire vive, his previous book, the images are accompanied by notes written during the period of shooting, in a briefer mode however, corresponding to the wandering of thoughts made possible by nocturnal roaming.