Writer and Pitchfork contributor Amanda Petrusich joined Tom Dunne on Monday night to discuss her book ‘Do Not Sell at Any Price: The Wild, Obsessive Hunt for the World's Rarest 78 rpm Records’.

Decent 78s are now all too rare to come by. Petrusich discussed the niche, and indeed dogged, search for these records which many music fans undertake.

78s are essentially the far-removed forebears of today's digital offering. They are heavy shellac discs, which Tom has recently been playing on the show on his newly purchased picnic gramophone.

Petrusich even spent time learning to scuba dive so that she could search for an apparent underwater treasure trove of shellac 78s which had been discarded in a river after a label went bust.

For the full interview, simply click on the link above.