I posted this list in another thread but probably should post it here for you, too, since you were asking for suggestions. In my first reply to you mentioned Harlan Coben but I have a much larger list for you to choose from (some of these authors have probably already been mentioned by other members):
Lee Child, Michael Connelly, James Lee Burke, Allison Brennan, David Balducci, Sandra Brown, Beverly Connor, Patricia Cornwall, Jeffrey Deaver, Nelson DeMille, Eileen Dryer, Lisa Gardner, Tess Gerriten, Kay Hooper, Tami Hoag, Gregg Hurwitz, Greg Iles, Christine Heggan, both Jonathan and Faye Kellerman, Philip Margolin, Steve Martini, Christine McGuire, both James and Richard North Patterson, T. Jefferson Parker, Thom Racina, Kathy Reichs (if you like the "Bones" tv series, you'll love Reichs' books), Nancy Taylor Rosenberg, Lisa Scottoline, Taylor Smith, Erica Spindler, John Sandford, Tom Savage, Mariah Stewart, Stephen White and, last but certainly not least, Stuart Woods.
In my opinion, pick up a book by any of these authors and you will be pleased with your choice ... all terrific writers of thriller mysteries.