Your eminence, thank you for answering, no I don't think that is the one for I don't recognise the author, I have at the back of my mind that it may be Joyce Porter who wrote the extremely funny Dover books but not sure at all!
Lucy Teatime didn't write crime novels, she was a character in them. She played a very demure old lady but with a decidedly iffy attitude.
See Smiffy's answer. As to "are they good" well I enjoyed them and found them funny.