PROMPT:   a digital illustration with shadows about a books, --sref https://cdn.midjourney.com/517dd352-4659-4084-b689-a32cd0da8b73/0_1.png, https://cdn.midjourney.com/f3dd0bfb-8226-4990-9d51-7e3d51cd00a6/0_2.png, https://cdn.midjourney.com/9ddc38b9-10b7-4d0d-9f98-bce3d9f5ded0/0_3.png, https://cdn.midjourney.com/61cb730f-ddbe-4c15-8dcc-396558d1d04f/0_3.png