Couverture littéraire gravée à double image

[Theme]: {Core concept or symbolism} [Subject A]: {First subject} [Subject B]: {Second subject} [Visual Relationship]: {Interlocking, mirrored, hidden, or transforming forms} [Book Title]: {English title} [Tagline]: {Short literary sentence} [Author]: {Fictional author name} [Accent Color]: {One subtle highlight color} [Aspect Ratio]: 9:16 Create a striking literary book cover combining sophisticated optical illusions, intricate vintage engraving, and elegant editorial typography. Composition & Optical Illusion Merge two distinct subjects into one unified composition using figureground reversal, shared contours, interlocking silhouettes, and clever negative space. Let one subject's outline reveal or define the other, creating a doubleimage illusion that rewards a second look. Use flowing curves, asymmetrical balance, and seamless visual transitions. Both subjects must remain recognizable. Engraving & Details Apply intricate scratchboard engraving, delicate crosshatching, and rich grayscale shading. Render hair, facial features, fur, feathers, architecture, or natural textures with precise directional lines. Combine richly detailed focal areas with bold silhouettes and clean negative spaces. Strong visual impact from a distance, exquisite details up close. Color & Atmosphere Use deep black, warm ivory, and layered charcoalgray tones. Add a tiny amount of the selected accent color to one meaningful detail. Maintain a mysterious, poetic atmosphere with refined matte print texture. Typography Include an elegant serif tagline at the top, a large italic serif title integrated into the artwork, the author's name in uppercase serif lettering, and a small "A NOVEL" label below. Ensure accurate spelling, elegant spacing, and clear readability. Final Requirements Prioritize visual duality, shared boundaries, intricate engraving, and sophisticated literary design. Output one complete, flat 9:16 book cover, without mockups.