I've read so many, mostly crime and political, and was running dry. Then I discovered Allan Folsom, who's been writing at least 6 years, and thought there must be more I have not found yet; maybe some that have been around a while. (not too old; if it's pre-computer it just doesn't work for me!)

Here are the authors I've read and liked: Lee Child (and most anybody who's  NYT best-seller); James Rollins, David Rollins, David Stone; James Lee Burke (not sure he's hard core but I love him); John Sandford. Greg Iles (not a series, but usually great); Vince Flynn and Carl HIassen (he's more humorous)

I tried Clive Cussler and just couldn't get into that.  I know I've forgotten some others, but all suggestions are welcome!

Maybe Vince Flynn his Mitch Rapp series is excellent . These are political/ action packed.  Matthew Reilly's  Shane Schofield series is great too. Also his Jack West Jr Series is good too.

Here are a few my favorites Andrew Brittion,James Patterson, Patricia Cornwell, Joel C Rosenberg,Stephen Hunter, Stephen Coonts, Jack HIggins, Stuart Woods, Richard North Patterson. I have not read any his books yet but  Brad Thor is good.

Hope this helps

Tammy

I 2nd the Brad Thor, Scot Harvath is the man and the Matthew Reilly recommend. I like Jack West, but Scarecrow is my man.  Jeff Deaver's Lincoln Rhyme series is very good. I would read them in order, but they read fine as standalones. F Paul Wilson's Repairman Jack series is downright awesome. However, it has to be read in order for the books to make sense. It also has a paranormal element that becomes more apparent as the books go on. But All The Rage is a standout to me in the series. Greg Isles Penn Cage series is the best as well as Gregg Hurwitz's Tim and Dray Rackly series. I would read it in order and I will warn you, The Kill Clause the first book has tough subject matter, but well worth the read. If you want a good medical thriller, Michael Palmer is a good one and everything but The First Patient has been excellent. If you like a bit of humor with your mystery, you can either go with JA Konrath and his Jack Daniel's myteries or Carl Hiaasen's crazy books. His books focus on Florida and usually shining a big ugly light on big government. They are all standalones and standouts so far for me are Sick Puppy, Lucky You, Native Tongue and Stormy Weather. I could go on, but have overwelmed you enough for now. :-)