I was lucky enough to happen upon Barbara's work when a ton of her books were easily available in paperback (the late 1980s), and I grabbed 'em all then, and was able to keep up and get the hardbacks as new ones appeared.
I know that mystery bookstore in Seattle, and will be visiting it next week, you may be sure. The plentiful supply of good bookstores is one of Seattle's chief claims to being a civilized city; I have a whole circuit that I visit.
And the Caruso books saw me through my flight to Bayreuth in 1988.
Andrew, those titles will cover the Kelly Ingram saga pretty well, but I hope you can pick up The Fourth Wall someday so you can get properly introduced to Abby.
I love The Renewable Virgin; it's one that I've enjoyed rereading several times (and a great title).