I'm slowly working my way through the Phryne Fisher Mystery Series. There are twenty books in the series (so far), so it's taking me a bit. Yes, it is the book series for "Miss Fisher's murder Mysteries" which is low key airing in the States on PBS (first two seasons are on Netflix), but like with most media adaptations, each source is pretty different. And honestly? I can't really say which is better. On the one hand, the universe of the book series is much expanded. There are extra characters, different story lines, and a level of bawdy that isn't AS present in the tv series.
That said, if you guys haven't checked out the television series, it really is quite good. At least in terms of a costume mystery series. And the producers have done a good job of adapting the source FOR screen (which is lovely to see). Plots are streamlined or not given as much of an airing. But! That's the TV series, and not the books.
Anyway, given that it's a long-running series (started in 1989), there are some definite ups and downs in terms of quality and consistency. The first few books (Cocaine Blues through probably Raisins and Almonds) are VERY OBVIOUSLY those of a writer finding her feet and voice. However, it's also very clear that the author has done some heavy research into the time period, both in terms of events and culture. She regularly includes citations/further reading lists that are primary and secondary sources from the time (the series starts in 1928, and has moved into 1929 as of book #16), so while there's definitely stuff I'm raising an eyebrow at (seriously, it took until book #15 for anyone aboriginal to show up, though someone rightly pointed out that there wasn't a huge aboriginal presence in Melbourne during 1928).
I also like that it's a series that's very specifically Australian. It shocked me pretty hard to realize that the first book in this series was the first book I'd ever read by an Australian author writing about events IN Australia. I mean, I'm in my mid 30's, and that had NEVER happened before. And while it's kind of easy to dismiss a bit given the US's shared colonial history with Australia, that's still a really jarring realization to make.
Anyway, the series is good light reading. It's basically a serial in the tone of 1930's detective pulp novels. It reminds me quite a bit in style, if not prose, of Dashiel Hammet, though with less of a noir theme. The series is very firmly in the breezy/cozy mystery corner, and is great, summer light reading.