Raymond Chandler wrote seven novels. I read somewhere that his favourite was "The long good-bye", but I didn't care for that one so much. I think my favourite was "The lady in the lake", though that's the last of the four Chandler novels that made it into this list: https://en.wikipedia.org/wiki/The_Top_100_Crime_Novels_of_Al...

I only read "Playback" for completeness: that last one is definitely less interesting than the others.

There are also the short stories, some of which were later incorporated into the novels and are therefore not republished so often in their original form. Chandler referred to them as "cannibalised".

I'd recommend starting with some of his collections of short stories, like 'The Simple Art of Murder' - https://www.fadedpage.com/showbook.php?pid=20140930 or 'Trouble is My Business' - https://www.fadedpage.com/showbook.php?pid=20150520

If you want to try some modern-er noir, American Tabloid by James Ellroy is a wild ride.

Maltese Falcon by Hammett