The article has whetted my appetite for this, which I began today. I'll probably break off from time to time to read other Spark novels.
Yes, I noted the Stannard; now on my list. My recent used book hunt, which turned up "Territorial Rights," also turned up:
I need to dip into it a bit. Also, don't forget "The Comforters"-- that first book is quite revealing and often the template for what follows.
Here's the article-review in the Washington Post. As I guessed, it is by Michael Dirda, the "belles lettres" guy in DC. He likes the essays and is a fan of the novels:
http://www.washingtonpost.com/entertainment/books/michael-dirda-reviews-the-informed-air-essays-by-muriel-spark/2014/07/09/7f83a936-fbd7-11e3-932c-0a55b81f48ce_story.html
Yes, really interesting review. Makes me realise just how much readable stuff by Spark there is.