Destroyer

Business manager's son suggested title of career-defining album.

Four-disc box also includes demos and a 66-page book.

Track "started off as just a song to sing the praises of this rock 'n' roll city" before gaining a deeper meaning.

'Destroyer' single features unorthodox instrumentation and an uncredited guitar solo by Dick Wagner.

Frontman hoped his track would become his signature song - until producer Bob Ezrin gave it to Gene Simmons.