This is why Amazon started as a bookstore. Jeff Bezos didn't just happen to like books. It was meant to sell everything from the start. Rather, he started out with books because he identified it as an area where an online marketplace solves a problem that a physical store cannot.
Yeah, the irony is that there was a competing online bookstore at the URL books.com, which was later bought by Barnes & Noble.
When I bought my copy of Peter Karow's _Digital Typefaces_ the proprietor asked if I was in a hurry to receive it, and if not, if it would be okay if he reviewed it first to see if it was something he would want to purchase.
https://m.youtube.com/watch?v=rWRbTnE1PEM&pp=ygUWQmV6b3MgZWF...