Bruce, there are two sequels to PUSHER, both are pretty great - they take place in the same world, but with somewhat different characters than in the first one.
Hey, Jules Dassin died today at 96 (guess he waited for Widmark to kick it - Dassin won). For anyone unfamiliar with his work, start with Rififi, then work your way through Night and the City (featuring Widmark's arguably best perf), The Naked City, Thieves' Highway, and the rough prison drama Brute Force. These are all very good films, but lots of his post-Blacklist stuff is ho-hum (including Never On Sunday, which various news outlets today dubiously refers to as his "most famous film").