Don’t you just love it when you have really enjoyed a book and find out there is lots more in the series?

I'm nodding along, noting down the ones I haven't read, so will recommend Sara Paretsky's V I Warshawski series, a female and feminist private eye in Chicago 1970s on (the first one or two take a little effort, after that she gets into her stride; Marcia Muller's Sharon McCone, San Francisco based 1970s on. and Donna Andrews' Meg Langslow mysteries, rural and small town Virginia 1990s on, much more of a 'cosy' that the previous ones with lots of extended family members, friends, pets, and occasional references to interesting American foods; ongoing.

And always Janet Evanovitch's Stephanie Plum, Trenton New Jersey bail bonds enforcer with her sidekick Lula, her dilemma about men, her hamster, her boss, her Grandma and the rest of her family. Often laugh out loud funny. And also still ongoing (unless something cataclysmic happened in the most recent one).

I've just finished The Swift and The Harrier and really enjoyed it. I previously had no idea she wrote historical fiction, I thought she only wrote modern crime like The Sculptress, which isn't my bag.

The second of her Black Death books is included with Kindle Unlimited but not the first, unfortunately. The Lost Hours, I think it's called

I already pay £10 a month for KU so I resent paying extra for one book.

Definitely this with Elly Griffiths and the Dr Ruth Galloway books.
Started book one earlier this year and read book 15 in the summer.

Ive now started the Zig Zag girl which is by the same author but different series. We'll see how it pans out.

I read the Farseer Trilogy by Robin Hobb years ago. Thoroughly enjoyed them.

Decided to revisit them a couple of years ago and discovered there were now something like 16 in the series. It was epic! Consistently brilliant too!

I loved Minette Walters books. There are so many of them too.

It’s been a while since I last read one.

I’ve just bought the second Freida McFadden Housemaid book and will probably then read the third one.
A film of it due out.

Oh so jealous OP. I remember the week I discovered Jane Casey - thanks to mumsnet - and read them all in 10 days.
Bliss

Kate Atkinson's Jackson Brodie seriesż

Kate Atkinson's Jackson Brodie series

Patricia Highsmith wrote several books featuring Tom Ripley, not just the Talented Mr Ripley. I binged them when I found out.

I read the first of Tana French's Dublin Murder Squad thinking it was a stand alone - such a good feeling to discover the rest of them.

An unknown to me but complete series is always the best find!

I love the Armand Gamache series by Louise Penny, Ross Greenwood, MW Craven (his books are all set in Cumbria where I live). Peter Morfoot, set in France.
I also love Richard Osman and the Frieda Klein series by Nicci French

It’s one of the best feelings….!

I love this series - I read them on my Kindle and have little time for deferred gratification when a new one is published. I don't wait for the price to come down, I just go for it.

J D Kirk’s DCI Jack Logan series.

I enjoyed them more for reading them in order. Lindsey Davis gives all of her characters an arc - they live, they die and leave a legacy behind them. Marcus Didius Falco (the protagonist in the Falco series) is a lad about town, son of a large, dysfunctional Roman family, very much like those the reader is familiar with. It's easier to follow what happens to them all if you read in order and it also helps you keep track of the politics of Ancient Rome.

A series of books by Susan Hill featuring chief inspector Simon Serailler - bought at a bargain price in a charity shop

@Deathraystare @Tortielady
these sound right up my street. Do they need to be read in order?

Came here to say this! They are your next port of call after you’ve finished with Strike OP! Absolutely compulsive

I picked up the first Ruth Galloway book from a swap box at work and I’m now reading number 15, the last in the series. Really enjoyed getting to know all the characters as their lives move on. I like that I can start a new book and immediately feel immersed in the story.

Crime series that I’ve liked include:

The Ruth Galloway series (she’s a forensic archaeologist in Norrh Norfolk)

The Ashes of London series (set just after the Great Fire of London)

Shardlake (set during the reformation)

Malabar House series (set in Bombay just after the Partition of India, featuring India’s first female detective!)

The Rivers of London (set in a sort of magical contemporary London - this one ran out of steam after about 7 or 8 books)

All crime.

@AllotmentTime I've never read the Strike books, so no idea how they might compare but as I mentioned above, can highly recommend the detective Tom Thorn books (starting with Sleepy Head) or detective Declan Miller books (starting with The Last Dance) both by Mark Billingham.

I am desperate to find a new series that I like as much as the Cormoran Strike books. Following for inspiration!

Even though it's not a very long series, I found this with Richard Osman's Thursday Murder Club's. The first three were really good but to me the fourth just fell flat, like he'd ran out of steam. He should have left them as a trilogy.

I did not realise this was a book series! I’d seen the tv version of the cover and assumed it was based on the programme!