Nocturna Ediciones presents the cover for the Spanish translation of Darker Days (published in The Netherlands as November), due out in mid-September 2026. This marks the fourth book to be released by this publisher. Nocturna is one of the largest publishers specialising in genre fiction and has utilised the artwork from the original edition by the British publisher Transworld/Bantam Books (Penguin Random House) for the cover design. The story has been translated from English into Spanish by Ana Isabel Sánchez.