Kerry Greenwood has two great series out. One, the Phryne Fisher series, is set in Melbourne Australia in 1929. Phryne is a detective. There are around a dozen or so books in it
The other, featuring baker Corinna Chapman, is set in modern day Melbourne & features very few bodies but lots of non murder related mysteries & a wonderful cast of characters. Both series are fun & great reads. There are 6 books in it.
Both series were recently released on kindle at last & are all less than $5 right now, many under $3 & the first in each is free.
Stephanie Bond has the 'Body Movers' series, set in modern day Atlanta, GA. In addition to each book's individual mystery there is an over riding story arc that runs through them. Plus she has some stand alone ones that are decent. I especially like the two set in Mojo, LA. All are funny. Not as slapstick as Stephanie Plum but some of the same humor. There are 6 books in it
There is also
Donna Andrew's Meg Langslow series, set in modern day small town Virginia. Has a Plum vibe but again, lacks the slapstick. I think there are aout 10 or so in it.
Carola Dunn has a well written series featuring Daisy Dalrymple, a 'modern woman' set in the early 1920s in London. About 15 books in this one.
If you are looking for something in the 50 Shades genre I highly recommend
Lorelei James' Rough Rider series - 13 books and a novella.