Victorian London mystery book cover, foggy street with gas lamps, slightly open old wooden door revealing a shadowy figure, antique key in the doorknob, single vintage typewriter key on wooden floor, a poised young female typist in period clothing standing nearby with a focused expression, faint "221B" Baker Street number in the background, silhouette of Sherlock Holmes with deerstalker hat and pipe blending into the mist, sepia tone, dark and mysterious atmosphere See more