But there are a lot of books/ebooks that worth having as regular reading or just as reference.
Few examples: The art of computer programming, Effective C++, Structure and Interpretation of Computer Programs, OnLisp, among others.
Yeah, you can find a few of them for free as a digital version, but they were written in a book fashion with the regular editorial process that is lacking in a lot of wikis and on-line docs.
I definitely see space for both if the material is good.
Please, do not read any solid computer science books. That's right, Google will solve all your problems.
You'd be wrong to assume that people who can successfully read (and comprehend) documentation are going to be the first to Google their way to an answer. Quite the opposite, in my experience.
Computer science? Sure, read CS books. When I want to learn a framework, I've got no use for CS books at that moment. I'll use my experience with the language, and my ability to read docs to learn how to do things. For core concepts, where one is entering uncharted waters, I've found that a book can provide some helpful guidance.