"I achieved such a practice that dreams came to me written at hand, even with their titles." Georges Perec was convinced that all the meaningful world is made of dreams. Some are remembered, others are told but very few are transcribed. The camera obscura is a rare volume, perequiano by the four sides, that reunites for the first time in Castilian one hundred twenty-four dreams of oulipiano genius. «I ended up admitting that those dreams had not been lived to be dreams, but dreamed to be texts; that they were not the royal road that I thought they would be, but tortuous paths that took me further and further away from the recognition of myself. "A book full of surprises and unexpected associations, a dreamlike device that does not pretend to" recount "one's own history, but to discover hidden treasures that are born in the magical moment when all the barriers are raised.