i'm arun from INDIA... i'm an automation engineer.. i was fed up with step 7 ladder logic. I wanna try STL and SCL... As a service engineer, i was forced to handle step 7 STL & SCL from german machines.. i heard tat Automating with STL & SCL by HANS BERGER.. is a very nice book..... Is there any way for free download of tat book.......? link plz.............. thanks all...........