[Grammar] The more ...., the less ....

[angelene001]

The more e-books are available on the Internet, the less frequently people buy traditional books.

Is the second part of this sentence correct?

 

[Raymott]

Yes it is correct.
I'd probably write, "The more e-books that are available, ..." There's a slight difference.
You can also omit the verb in the first clause in this case: "The more e-books available, the fewer traditional books people buy."

The following page gives some idea of when verbs can be left out with this constuction. If in doubt, use a verb.
http://www.grammar-quizzes.com/themore.html