Sunday afternoons were made for doing this kind of thing…
(click here for the biggest version)
Several thousand of our books, arranged vertically by hue and horizontally by lightness. The value was calculated by finding the average colour of the book cover and then converting that to the relevant HSL value. There’s a little bit of randomness thrown in too, in terms of rotation and position. The image was created using Perl and ImageMagick.
If nothing else, it shows that we have more red and blue books than green or pink ones!