As you see here, all books are by an american writer
            Terry Pratchet. They are as follows (from left to right):

            1: The Light Fantastic - a magisian's called (Rinswind) travel
             over (?) The Diskworld.
           2: Mort - History 'bout a boy Mort that became  Deth's
               student.
           3: Equal Rites - Pratchet writes about equal rights of using
             magick on the Diskworld.

      WHAT KIND OF PERSON WOULD WRITE ABOUT A FLAT
          WORLD THAT LIES ON BACKS OF FOUR ELEPHANTS
             THAT STAND ON A GIANT GALACTIC TURTLE?

            AND WHO WOULD THEN ASK
                                          "WHAT SEX IS THE TURTLE"?
                                               That's bout Pratchet found on one of his fan-sites.

             Unfortunately whe had only four books published in Russia (The fourh one will be soon here).
             The fifth one will soon be available so Whatch Out!