There is some history there. Google was involved in a project where they were scanning in all works at various libraries. The author's guide got outraged and sued, and it ended up in court. If I remember correctly, the outcome was that Google scanning was considered fair use, but they couldn't make the complete work available without the author's consent.
This wiki page gives a more or less reasonable summary of what happened.
https://en.wikipedia.org/wiki/Google_Books