The Unwritten Law by Deep Purple Overview Tag Appears on 1987 The House of Blue Light Child in Time Greatest Hits Greatest Hits Disc 2 Greatest Hits StarMark CD2 Hungary Days Icon Icon: Deep Purple Knocking At Your Back Door Knocking at Your Back Door (Th Knocking at Your Back Door: The Best of Deep Purple in the 80's Knocking at Your Back Door: The Best of Deep Purple in the 80’s Knocking at Your Back Door: The Best Of Deep Purple in the 80's Knocking At Your Back Door: The Best Of Deep Purple In The 80's (1992. D101906 (314 513 430-2)) Locked In A Paper Cage Star Mark Greatest Hits CD2 The House of Blue Light The House Of Blue Light The House of Blue Light (1999) The House Of Blue Light (Germany, 831 318-2) The House Of Blue Light (Polydor 831318 2,Germany) 1987 The House Of The Blue Light The Very Best Of Aerosmith Wembley Arena 4.3.87 Playcount 379 Listeners 126