Earlier quoted context omitted.
There are thankfully many publishers and booksellers, each with their own ideas of how to do business. If you buy an iPhone you only have one place to "shop"
> There are thankfully many publishers and booksellers, each with their own ideas of how to do business. There are also thankfully many phone manufacturers, each with their own ideas of how to do business.
I think the book analogy is a poor one, sorry!