Stephen Hunter's novel Point of Impact has been made into a film called Shooter.
The novel features reclusive 'Nam veteran and former marine sniper Bob Lee Swagger. He's reluctantly dragged out of his self-imposed exile in order to help the US government in a matter of national security. Of course it all goes tits-up and Bob finds himself caught up in a web of lies and assassins. Cue betrayal, gun battles, and meditations on the meaning of honour.
Mark Wahlberg doesn't look anything like Bob and I'm assuming they've changed his origin so that he served in a more recent conflict. Also, the character played by Danny Glover has a different name from the character in the novel. More worryingly, going by the synopsis I read off the internet the plot has been altered slightly. The trailer also suggests changes, although trailers often show scenes out of context so I'm hoping that this is the case here and the film makers have actually been reasonably faithful.
Point of Impact isn't my favourite Hunter novel (that would be Black Light, or possibly Dirty White Boys, depending on my mood) but it's still good fun and I want to see its film adap done properly. Especially as the success or failure of Shooter will probably dictate whether any more of Hunter's books make it to the big screen.