Carax burns his own books
Julián Carax, a Barcelona novelist whose books sold almost nothing, is presumed dead after the Civil War, and a disfigured man calling himself Laín Coubert (the name of the devil in one of Carax's novels) travels around buying up and burning every surviving copy. Daniel Sempere eventually learns that the burner is Carax himself. He was scarred in a fire and grief-stricken after learning that Penélope Aldaya, the woman he loved, was his half-sister and had died in childbirth, and he set out to erase his own work and past. The single copy Daniel rescued from the Cemetery of Forgotten Books survives because it was hidden and adopted by a reader.