A back cover design for the book 'O Crepúsculo da Civilização

A back cover design for the book 'O Crepúsculo da Civilização'. The background features a dark and devastated cityscape, with remnants of futuristic technology and ancient magical symbols glowing faintly among the ruins. In the distance, silhouettes of twisted, mutated creatures can be seen lurking in the shadows. The atmosphere is ominous and foreboding, with a dim, reddish glow on the horizon, suggesting a distant, looming threat. The back cover should include space for a synopsis in a clear, readable font, with enough room for author information and a barcode at the bottom." }