I read detective, cop, FBI, lawyer related books and I have several authors and series that I like.
James Patterson- Alex Cross series, Womens Murder Club series, and Michael Bennet series
Jonathan Kellerman- Alex Deleware series
Alex Kava- Maggie O'Dell series
John Sandford- Prey series with Lucas Davenport and Virgil Flowers series
Catherine Coulter- FBI Series with Savich and Sherlock
Patricia Cornwell- Kay Scarpetta Series
Stuart Woods- Stone Barrington Series and Holly Barker series
Jeffery Deaver- Lincoln Rhyme series and Katherine Dance series
Iris Johansen- Eve Duncan series
Janet Evanovich- Stephanie Plum series
Lisa Scottoline- Rosato lawyer series
I also like non-series authors like
Nicholas Sparks, Sandra Brown, Tami Hoag and some of the authors mentioned previously have individual books as well that are good.