For or against reading books.

Book - is it still the main source of knowledge nowadays ?
Since the middle-age times, when the type was invented books have been biggest mine of information.
This situation remained till the end of the 20th century when global web was created.
Now a book is in the shadow of the Internet but will never be substituted by global web.
There are many advantages of reading books and I'm going to write about a few of them below.
First of all, thanks to reading we develop our imagination. It will pay off e.g. by improving our writing comprehention.
Secondly, we learn grammar structures, spelling and then we tend to make less mistakes.
Thirdly, in contrast to the Internet you can take your book whenever you want because it doesn't need electrocity.
And finally we extend our knowledge thanks to reading, especially when we read educational books.
There are also disadvantages of reading. But it depends on personal inclination. (upodobania).
Lots of people would argue if you say any bad word about reading books, however there are people who hate this way of
acquiring knowledge.
The first and the main reason why reading may be dangerous is a fact that if we read much our eyesight may get worse.
It will not happen at once but gradually.. after a few years.
Secondly, reading takes much time. Some people even become addicted to reading.
And lastly, if you like reading it may be also dangerous because you may spend much money on books.
And believe me, this is quite expensive hobby.
To sum up I must say that despite the disadvantages of reading, books were, are and will always be one of the most
common sources of knowledge and nothing else can substitute them.