- identify the book's theme
- measure the quality of the information
- determine authenticity / malicious content
- remember the position of the book in the colossal stacks
Then the librarian can start to refer people to books. This problem was actually present in libraries before the revolutionary Dewy Decimal System [1]. Libraries found that the disorganization caused too much reliance on librarians and made it hard to train replacements if anything happened.
The Internet just solved the problem by building a better librarian rather than building a better library. Personally I welcome any attempts to build a more organized internet. I don't think the communal book pile approach is scaling very well.
[1]: https://en.wikipedia.org/wiki/Dewey_Decimal_Classification