The bookstore in our campus called the Tata Book House (and I don't think the House of Tatas has anything to do with it) doesn't bother to stack its books in some (any!) order; the business is so brisk -- they offer 20 % discount! -- that they don't have to. Anyways, their low-end stacking technology throws up surprises all the time.
A while ago, I was tickled to find a book on human resources management stacked right next to a book on pest control.
This morning, I found John Gribbin's popular science book 'Schrodinger's kittens' rubbing shoulders -- er, covers -- with another book. Can you guess which one?
Arindam C's Chickens!