“Huge Book Sale” reads a handwritten sign taped to the shop’s front door, “All Books 50% Off.” I’m here to meet Ted Tafejian, the owner and founder of Ted’s Used Books & Collectibles, to talk about ...

The TED series of brainy, idea-mongering lectures became a phenomenon among the YouTube cognoscenti in recent years, and now the people behind the lecture series have unveiled a new app to keep ...