Sky Fantasy Book Cover Design (in sand tones)

Visuals: A mystical hourglass at the center spilling waves of sand, each grain reflecting fragmented images of an ancient world. Faint echoes are depicted as transparent rings emanating from the hourglass. Surrounding this, ghostly silhouettes of siblings, arms outstretched as if reaching through time, navigate a world of floating clocks whose numbers are subtle yet visible against a starry night sky. Each clock face reflects a different era, hinting at their adventures through time. The background fades from deep indigo at the top to shimmering gold at the bottom, capturing a transition from mystery to discovery.

Typography: The title "Echoes Of Tomorrow" is in a bold and elegant serif font, with the text layered in a slightly distorted style to imply the echo theme. The author's name, "C. L. Roberts," is in a smaller, complementary font at the bottom, sleek and modern in contrast to the title, suggesting the merging of old and new worlds.

Layout: The title is prominently placed at the top, arched to mirror the rings of echoes emanating from the hourglass. The hourglass is centrally positioned, commanding focus. The author's name is positioned subtly at the bottom amidst the golden shimmer.

Explanation: The visual composition of the design is intended to capture the elements of fantasy and adventure through the imagery of the hourglass, which serves as a metaphor for time travel. The surrounding reflections in sand grains and floating clocks signify different timelines in the sibling's journey. The typography chosen for the title reflects a timeless and echoic theme, both visually compelling and succinct, aligning with the fantasy genre's grandeur. Meanwhile, the author’s name in a sleek font bridges the narrative’s historical depth with a modern touch. The semi-gloss finish enriches the visual appeal, while the gold foil highlights introduce an element of magic and discovery, consistent with the book’s theme.