What makes a cool book cover?
Is it an elaborate background design that tells a story like those found on many science fiction book cover designs? Perhaps fantasy elements or magical hints make a cool book cover? Does color play a part? Is a cool book cover one that is set in a cold environment like The Arctic Compass?
When I think of cool book covers, I think of those that stand out from the rest. One of my favorite stock searches is the word "surreal". I love adding dreamlike and fantasy elements on a design. A cool book cover design should take you to a new place or envoke feeling.
What about color on a design? Blues and greens are cool colors and can certainly set a cool tone for a cover design. Adding water, rain, snow or fog can also create a cooler look. Regardless of what makes a cool book cover design, I think all book cover designs should be unique and have some whimsy. They should bring the viewers into the story, capture their attention and tease their imagination.