As I was working in a library, I saw a DVD on the shelf titled, "What's New in Libraries", and it was specific to northern Illinois. How specific! In another library I noticed a 3-inch thick reference book from the 1990s that listed the prices of household and industrial goods throughout US history. For example: how has the price of a Coke changed over time?
I'm fascinated by niche areas of knowledge, especially when they're hidden in physical media: old library books, magazines/journals with only physical publication, and the knowledge residing in people's minds. We can benefit by browsing these media because we might serendipitously stumble across an insight we weren't seeking... and discover something that hasn't already been tabulated on the Internet.
For example, in the library I stumbled upon a magazine titled something like, Chicago Muslim School Parent Magazine. In it, I read an article emphasizing the importance of welcoming your student home and asking about their day. This relates to an issue I'm addressing in one of my innovation consulting projects, plus it aligns with what my parents have demonstrated.
City Newsstand in Chicago boasts 5,000+ current magazine titles!!!!!! I haven't visited yet, but imagine the serendipitous insights to be gained from so much specific knowledge (and I'm sure not all of it is published online).
Then, there's knowledge that's locked away in each of our minds. The Human Library facilitates dialogues to break barriers in empathy. For example, people who have experienced race or sexual preference discrimination will have one-on-one conversations with people who want to 'read' that book.
There's more knowledge than what's on the Internet, and if we allow some moments to step back from our process-driven methods of analysis, then by aimlessly browsing media we might find insights we didn't even know to look for.