I don't expect much from Bard but we shall see.

For few weeks now I had a thought experiment of creating a LLM search engine trained on books. Such LLM search engine would be most reliable if you seek knowledge but as others mentioned if you want up to date information, search engine is probably your fastest and easiest way to go. But actually I wonder and somewhat doubt that data, information and knowledge in books is lagging significantly behind Web's data, information and knowledge. One big advantage of books is that they are more reliable and more in depth source of information and knowledge than some random site, blog or Wikipedia article. Scientific research papers also come to mind as a highly reliable source of information and knowledge.