Excellent Women by Barbara Pym, read by Gerri Halligan. OK, OK, I might've only just read the book, but I found the audiobook and couldn't resist. I LOVE Ms Pym and the audiobook is even better than reading it myself.
Agatha Raisin and Love, Lies and Liquor by MC Beaton. Listened to this before, but thought I'd squeeze it in again between longer books. I love Agatha, she's so grumpy! Excellently read by Penelope Keith.
Agatha Raisin and the Fairies of Fryfam by M. Beaton, read by Penelope Keith. I wasn't keen on this one when I first listened to it a couple of years ago, but, actually, it's really grown on me and I enjoyed it much more this time around.