But people actually do sell books. It’s not the case that Amazon always comes to new book store locations and undercuts them on price just long enough for them to go out of business.
Amazon undercuts pretty much every bookseller on price. A few local/specialty shops can survive but Barnes & Noble is pretty much the only national competitor left in the US and they are on the ropes. My local B&N is now a pile of rubble, soon to be a fast food place.