Earlier quoted context omitted.
What's confusing? Shipping a book from a warehouse is cheaper and maintaining a website is cheaper than setting up and selling from a physical store. If I order a book online, I don't want to subsidize the walk in customers.
I can’t think of any other retailer that does this. Best Buy, Walmart, Famous Footwear, Bed Bath and Beyond, etc. all honor the same prices in person as they do online.
I'm surprised by the experience related here - I'd absolutely expect the store to price match online when asked about it even though I believe they were separate divisions.