A professional audiobook cover for a psychological thriller. The style should be dark, moody, and suspenseful. The main imagery should subtly evoke themes of lost innocence and hidden danger. Imagine a slightly out-of-focus, dimly lit nursery scene. A single, antique baby rattle is prominently placed in the foreground, casting a long, distorted shadow. In the background, a large, ominous window with rain streaking down the glass hints at the outside world and potential threat. The color palette should be dominated by deep blues, grays, and blacks, with a single, unsettling splash of desaturated red (perhaps on the rattle or a subtle detail). The composition should be tight and claustrophobic, creating a sense of unease and mystery. The text "Baby City" by Freida McFadden should be clearly legible in a modern, slightly distressed font, with "Baby City" being the largest element. The overall mood should be unsettling, hinting at a disturbing secret lurking beneath the surface. Aspect ratio 1:1.