(click on images to enlarge)
...reminding me as it does of that time I noticed this happy accident on my own bookshelf:
Yay for books!
This was originally posted back in May, but was removed from the site when I realized that it had been co-opted by the Russians as some sort of hacker portal. The Internet is a strange, strange place.
Anyway, for the sake of completeness, here it is again.