Jo Gilbert's grandfather was an icon of Melbourne.  Working at 3AW from it's opening night, writing and performing thousands of jingles and songs. Including the legendary tunes "Along the Road to Gundagai" and "Our Don Bradman".  Jo has written a book "Along the road to Gundagai - Biography of Jack O'Hagan and Birth of Australian Pop Culture".  It's an amazing tome, and it's out now. - check out www.jackohagan.com.au