Not sure if you are talking about books in printed form or if you are including ebooks as a form of "online docs".
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.
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.