On Monday’s Afternoon Shift we talk about two businesses that helped craft the current online paradigm. First, Bob Boilen of All Songs Considered and NPR Music joins us to talk about the state of music discovery today.

Groupon is one of the fastest growing companies of recent memory. They’ve already had their IPO, now there’s even a book about them. The author of that book, Time Out Chicago editor Frank Sennett, joins us to talk about the daily deal site and how they took the internet by storm.