ac/dc will be doing well to better this excellent example of an album that just works,great songs,great songwriting,and still sounds great over 25 years after its release,yes it is their defining album,bon scott was the definitive ac/dc vocalist,i aint being disrespectful to brian johnson who has been his replacement for over 26 years,its just that bon brought a dirty rock n roll snarl to the vocals which complimented the blusey rock and roll that the young brothers dished out on guitar.there isnt one bad song on here,songs like the legendary highway to hell,walk all over you,if you want blood,shot down in flames and touch too much are all on here and they are cracking stomping rock n sleaze roll numbers,its a pretty flawless album,its a fun album to listen too and it deserves to be listened to loud,you will salute them after this,magical album