I see what you're getting at, and I certainly am not suggesting we should forsake the Net and go back to papyrus scrolls. My point is that when I use the net, I go look up a fact. (Unless I use it as a tool for more extensive research, which I still have to laboriously put together to make some sense of.). When I read a book, I get one mind's edited and considered lifetime research on some complex philosophical issue, especially if the book has been accepted and thoroughly criticized by the scholarly community, and incorporated into a broader philosophy. Even if it is subjective or skewed, it is consistent and coherent.
If you read a hundred books on any topic, especially volumes which have stood the tests of time and critics, you will probably not be able to recall even 1% of the pure factual content included there. But you will be educated in that topic to the extent that you will have spent a lot of time pondering the best thought of men who have thought hard and long on that topic.
Just consider, reading several volumes by Ayn Rand, or even Robert Heinlein, shows a distilled, consistent and reasoned view of reality which would be very difficult to duplicate by simply following hotlinks on political websites for a few hours. A book does not just impart information, it exposes you to a teacher. Even if the teacher is mistaken, there is a structure there with internal logic and a lot of thought and effort already done for you. It's a Cliff's Notes by a master.
A book is not just a source of information, it is access to another mind, usually one better (or at least, better known) than your own.