Finished Raymond Chandler's "The Big Sleep" and am halfway through his second Marlowe novel "Farewell, My Lovely." Both are narrated by the fantastic Ray Porter. They are both fast listen/reads, the stories move along and the characters are colorful. But it is Chandler's descriptions and similes that really make it pop. Plus Ray Porter is my favorite narrator/performer and it really isn't close.
If you are interested to read/listen to where all modern detective's/p.i.'s evolved from, "clichés", "tropes" and all, this is where to start.
Hard-boiled and two-fisted.
