Blood Law (Zac Hunter) by Steven Hague

He was the best new PI last year... And this year he's back already! Ex-cop Zac Hunter is just wondering what to do with his life and how to make a difference without a badge when he's drawn into a new adventure. His old informant, gangbanger and babe extraordinaire Angel asks him for help when her daughter has been kidnapped. When Hunter investigates he finds out he's been caught in a web of lies and a maelstrom of violence. Along the way he meets a Native American vigilante, Stone, who's such an impressive character you get the feeling he deserves a novel of his own. It looks like he might be back in the next novel as a sidekick of some sort. Can't help thinking of the Lone Ranger and Tonto.
Even more actionpacked then the first novel (Justice For All) that reminded me a lot of Michael Connellý this one takes you more into Lee Child territory.
Worth it if you're into hardboiled action!

Father's Day (Louis Klein) by Keith Gilman

Ex-cop Louis Klein is asked by his old partner's widow to track down her missing daughter. Not exactly a new story premise, right? So, why did it win the Minotaur Books/PWA Best First Private Eye Novel award? Easy, it's because of the good writing. There's a James Lee Burke-like poetry and literacy to the words in here. Combine this with the fact the writer is a real cop and gives the story a very authentic tasteand you've got a great example how you can write a great PI novel without trying frantically to do something different.