Some of my favorites...current favorites

I don't tend to read just one or two authors anymore like I used to. I think that is a good thing.

If a person asks me for a recommendation for a mystery book, I do have some authors/series that pop into my mind right away. 

Louise Penny: Gamache series - traditional mystery set in Canada with Inspector Gamache as the main character

https://www.louisepenny.com/

Jack Benton: Slim Hardy series - noir mystery, lone detective Slim Hardy, down on his luck set in England 

https://www.fantasticfiction.com/b/jack-benton/

Susan Wittig Albert: China Bayles series - cozy set set in Texas, China Bayles runs an herb shop in a small town

https://susanalbert.com

Virginia King: Selkie Moon series - a touch of mystic/supernatural starts in Australia but then each book after the first is set in a different country. Tiggy Jones series set in Devon, England.

https://www.virginiakingbooks.com/

M.C. Beaton : Agatha Raisin series - humorous cozy in England, Hamish MacBeth series set in Scotlad

https://www.mcbeaton.com/us//

Victoria Thompson: Gaslight Mystery series - historical mystery series set in New York, midwife, turn of the centurhttps://victoriathompson.com/

Elly Griffiths: Ruth Galloway series - traditional set in England, archaeology

https://ellygriffiths.co.uk/

Jane Harper: Aaron Falk series - detective/police investigator mystery set in rural Australia, also the standalones are very good 

https://janeharper.com.au/