Act as a visionary concept artist with extensive experience in surreal and cosmic landscapes. Create a highly detailed depiction of a cosmic library that defies logic and physics. The library should stretch infinitely in all directions, filled with [countless floating books] arranged in mesmerizing patterns. Incorporate [ancestral ladders] that appear to defy gravity, spiraling and floating effortlessly between towering shelves. Use a color palette dominated by [ethereal blues, purples, and golds] to evoke a sense of otherworldly wonder. Include subtle glowing runes or symbols on the spines of the books, hinting at ancient knowledge. The scene should feel both awe-inspiring and tranquil, inviting viewers to lose themselves in its vastness. Ensure the lighting is soft and diffuse, with beams of light filtering through unseen celestial windows. Aim for hyper-realistic textures and intricate details to make the scene feel tangible yet dreamlike.