A short book that I read in one day. I'd like to give it four stars, but I just can't.
Stoddard's premise, that nothing bears a (handwritten) letter, is largely valid. However, that was over 30 years ago, where things have vastly changed. Most people are going to print out longer letters, rather than write pages of text (I said, most). By today's standards, that's still more personal if mailed than an e-mail. It's about taking the time to send complete thoughts. Especially, thank-you, condolences, etc.
I don't know any other way to put it, so here goes ... She comes from a VERY privileged background, which was the norm for her, but almost everyone else? Not so much. For instance, for her small business stationery needs, nothing less than consultation with and oversight from the CEO of Tiffany's would do! That made it quite difficult to identify with her as a person (bond), the feeling that only the 1% are the true target audience here. May not be fair, but it was my reader experience.
I can recommend the book, keeping in mind that you don't need the fancy, expensive supplies she references. Most people are fine with using regular pens on anything "fancier" than notebook paper. Moreover, note cards have their place as well.