Sure we have information at fingertips but how do we know we are getting all the information on that topic.
With a book they put it all in one place and it is hard for government to censor what is in there. An author doesn't need to worry about a page getting taken down. All you have to worry about is how hard it is to get published and will it survive a book burning (Most do because its hard to burn them all). A book publisher is the only one that can censor you and if you don't want to be censored all you got to do is publish it yourself. And to avoid biasness you just need to read another book.
With the internet you are relying on the search engine to not hiding something. How do you know you asked the right question? Is there politics preventing you from getting a key piece of information? Is the search engine or website an echo chamber of biasness?
With a book there is less questions on whether or not you got all the information but with the internet there is to many questions that most wont ask themselves. The ones who are intelligent will ask those questions and not limit themselves to the internet.