Most read has got to be Karin Slaughter
I enjoy mysteries, and have many authors in this genre that I like. However, if I had to choose only it, it would have to be Agatha Christie. She is one of the reasons that I became such an avid reader at a young age.
The Queen of Mystery, Agatha Christie!
I love reading Lisa Jewel and Michael Clark books!
My most read (and loved!) mystery author is Tana French!
Tough to pick my favorite–Iris Johansen & Agatha Christie are at the top of the list for sure!
Riley Sager is my favorite. There are so many great mystery authors out there. Thank you for the chance!
Agatha Christie, for sure!
One favorite of mine is Linda Castillo
Ruth Ware is my favorite mystery author! This is a hard choice though because I love so many of them! Riley Sager, Gillian Flynn, and Stephen King are all in my top 5, but Ruth Ware is definitely my favorite!
Probably Linda Castillo or B.A. Paris
Stephen King and Riley Sager
Charlie Donlea and B.A. Paris. 
Ruth Ware is a favourite
My favorite mysteries are from J.D. Robb…the In Death series.
I am currently reading Hostage by Claire Mackintosh 
I really love Alan Bradley’s Flavia de Luce series. It’s a fun read
I read Jeff Abbott An Ambush of Widows
Probably a toss up between Patricia Cornwell and James Patterson simply by the number of books they have available.
Most recently, probably Deanna Raybourn!