Although I have read -- and enjoyed -- virtually every book in every series by the most famous female mystery writers, Carolyn Wheat unequivocally remains my favorite.
This series is about a Legal Aid attorney named Cass Jameson. As such, it introduces fascinating glimpses into seldom-seen areas of the legal system -- along with providing excellent mysteries. This is one series I buy in hardcover as soon as each book is published.
The books are all very well-written, fast-moving, and entertaining. I cannot sufficiently recommend them. IMHO, this is the best mystery series available.