A patron asked for help finding books on Taoism, so we walked over to the Religion section. As we were flipping through the index of books in the 294's and 299.514, I noticed something odd - many of the books we picked up all had bookmarks in them.
It's not uncommon for people to leave bookmarks in library books. But in this case, all of the bookmarks were identical - they were all business cards for a local yoga studio. Interesting. After I finished helping the patron, I went to the 613.7's, and sure enough - all our yoga how-to books also had these business cards tucked in them.
I dislike businesses targeting patrons, and in fact it's against our library policies, but I did think this approach was clever (although I shudder to think whose business card would end up in the 613.96's).
It also reminded me of a library tactic I fail to use effectively: put promotional bookmarks in books. It's a great way to drive traffic to your subscription databases, online subject guides, special programs, or general announcements, but it's also tough to maintain.
But too, this book-based advertising could be used as a fundraiser for libraries. Local business could donate money to purchase books on a certain topic, and in exchange they'd get a label on the book saying it was donated by them. Libraries would be able to expand collections, and perhaps also charge these businesses a fee on top of that.
This last idea is of course a terrible one. But the one before that is legitimate, really. And for another interesting library/business idea, check out Brett's idea for "Amazon Libraries."