I enjoy twisty English style mysteries (Minette Walters, Stephen Booth) as well as the forensics of Kathryn Fox and Kathy Reichs and dog-related mysteries (Conant, Berenson, Ball) and women PIs (Paretsky, Grafton)
Iris Johansen. Look for her Eve Duncan series. They have SAR dogs in them and it's best if you can start from the first one.
Patricia Cornwall's early books are VERY good, but she lost it somewhere after she wrote about Jack the Ripper.