A minimalist and ethereal abstract artwork suitable for an audiobook cover. The primary element is a stylized, glowing tree with roots extending downwards and branches reaching upwards, symbolizing knowledge and growth. Wisps of soft, diffused light emanate from the tree, creating a sense of wonder and introspection. The background is a gradient of deep, twilight blues and soft, ethereal purples, evoking mystery and contemplation. The composition is centered and balanced, with a subtle sense of depth. The overall mood is peaceful, intellectual, and slightly mystical, conveying a journey of discovery. Square 1024x1024 format.