From a language perspective, what is a good book to read?

Question

Yes, it does.

Answer 1

Anything by J.R.R. Tolkein and John Steinbeck.

Answer 2

Anything by Alexandre Dumas or Mark Twain.  

Answer 3

Shakespeare.

Seriously books today don't have good language.

Answer 4

I am not sure I completely understand your question - what do you mean from a "language perspective"?

If you are referring to books that have well-written, or beautiful prose, or books that are very stylized, than I would suggest:

Atonement by Ian McEwan

On The Road by Jack Kerouac

The Stones of Summer by Dow Mossman

All are great novels that use amazingly beautiful language.

Does that answer your question? Hope I helped.