Laura Lemay, the legendary Teach Yourself uberauthor who cowrote several of my Java books, solved a 20-year-old mystery by turning to the last place anyone would expect to find information:
"I'm looking for a book," I explained to the librarian. "Published probably in the 70's, about a psychological experiment done on teenagers. They are imprisoned in a maze and have to dance in order to get food pellets. It was a really dark book. There were escher-like stairs on the cover."
The one-minute response time was much slower than Google and returned only one result, but it was accurate.