Can anybody tell me some Twelve-tone song or author, so then I can look for in on Internet and see what's this about?

      > Iszil

How about Arnold Schoenberg, Milton Babbit, Webern, Benj. Boretz, Stefan Volpe
Google "Perspectives in New Music" and I am sure you'll be able to find twelve tone composers.
There are several theory books on the subject.
Also, youmay want to distinguish between twelve-tone composition and serial composition. They are similar but not the same monster.

It is interesting that much of Wagner's music uses twelve tones like the prelude to tristan and isolde which is chromatic from the start. Check it out.