"A clean, hand-drawn flat design illustration of a stack of books of various siz

"A clean, hand-drawn flat design illustration of a stack of books of various sizes and colors. The books are neatly piled on top of each other, with their spines facing outward. The design is isolated on a transparent background, allowing it to be easily overlaid onto different media. The colors are vibrant, including shades of blue, red, yellow, and green, with subtle shadowing to add dimension."