I'm assuming you mean the film noire genre? So do you mean strictly hard boiled detective style noire? If it's the latter then you have to go with the classics.
Authors:
Dashiell Hammett: The Maltese Falcon, The Thin Man, Red Harvest, and any of his short stories. Hammett actually worked in the detective business in that era, so he knows his stuff, and he's a fantastic writer as well. He's the father of the american hard boiled detective style, and the influence of his work was worldwide in his own lifetime. Hell, he inspired some of the scenes and story of Kurosawa's film Yojimbo, which in a weird bit of cultural cross-pollination, ended up coming back to the west when it was remade as "A Fistful of Dollars."
Raymond Chandler: You know the noire detective narration you hear in every reference to film noire? Chandler invented and perfected it. He's got a zillion short stories and a few novels. The Long Goodbye, and The Big Sleep are particularly famous
Mickey Spillane: This guy is basically the pulp version of Chandler. Tends to be heavier on the sex and violence, but still excellent hard boiled noir detective stuff. Just look up the Mike Hammer novels and you'll see the list of his stuff.
Movies: Anything based on the works of Hammett and Chandler. Notable works being "The Long Goodbye" "The Big Sleep" and "The Maltese Falcon"
For a more modern take...
The movie Brick takes the noire setting and applies it rigorously to high school. Not just a high school detective movie, but also the general society that noire films and novels take place in. It's a fantastic movie, and if you like noire you'll like it a lot.
For other noire stuff... Just look around for older films and you can find tons of stuff. Use the google to find out which ones are good.