English

I learnt proper English some years ago. Strict, in the grammar sense, English. However, more and more, I see my abilities being deteriorated due to the internet. Even native speakers make constant mistakes, being some horrendous, which from those, unfortunately, I am beginning to be a victim, as I can notice them in my own speaking.

Would someone mid recommending a good book I can download from which I can revise some concepts?
Also, is there any online resource for prepositions (these I always had trouble with)?

Thank you, /lang/

>>14

I just want to be sure people won't look in disdain when I speak or, more importantly, write.
I am committing uncountable mistakes, lately. Some years ago, when I got my CPE, I was much better than lately.
I haven't used English for quite some time, being internet use the exception. I would really desire to regain my technique.

>>13

I could even read literature, however, it would not be a good way to grasp some things (preposition is what concerns me the most). Moreover, many good literature I know about use archaic English. I am not in synchronization with current literature.