"Mrs. Jeffries Defends Her Own" is a historical mystery set in England in the late 1800's, though we don't know the exact year. The period details tended to be a bit vague, though there was enough setting and period detail to give the story a historical feel. The characters were engaging and realistic, though not highly complex.

This book was the thirtieth book (I think!) in the series, but you don't need to read the previous books to understand this one. And this book didn't spoil the mysteries of the previous books, so you can read them out of order.

The story was primarily a clue-based mystery where the reader and characters need to discover and then sort through the clues to figure out whodunit. Though I thought it was fairly obvious that one or both of two specific characters were whodunit, Mrs. Jeffries had a valid reason to be a bit delayed in coming to the same conclusion. And then she cleverly set up a trap to determine whodunit without the Inspector being any the wiser that she was behind it. (This was handled believably.)

There was no sex. There was a minor amount of explicit bad language (some of it was British bad words). Overall, I'd recommend this enjoyable and well-written mystery.

I received this book as a review copy from the publisher.