David Cox is an agent with ?The Project?.
I put question marks around this because I really do not know for sure. If the idea behind the secret agency is to remain secret, it is doing a bang-up job. It is involved in some pretty dangerous undercover work where many of the members of the team do not make it back and its missions seem all over the world but again, exactly why it is is remains unknown.
David Cox is a known factor. He does not exist. Not really. On paper and once in a while in the flesh of a person we know first as {i`The Roommate`i} (in the novella that starts the adventures) and then as {i`Amy's Husband`i} (in the first book). He becomes David Cox when it is needed. He also become Alan Drake for a time in an impressive identity that has him a mining expert. But David Cox is the fake identity we see him in twice so that is what we stick with.
{i`The Roommate`i} is a college student just short of his diploma but who has had to retake several courses because he will get a call and then disappear for sometimes weeks before returning with little or no excuse. {i`Amy's Husband`i} is the man that he becomes when he is finally finished with school and out in the ?real? world.
Whichever identity he chooses to use, whether fake ones on his missions or the unspecified person who is both {i`The Roommate`i} and {i`Amy's Husband`i}, a couple things are obvious.
First, As the former, he is a dangerous man to know while as the latter he seems the epitome of safe.
Second, as both he is not trustworthy at all. He can lie or obfuscate at the drop of a hat and do so convincing enough to have the listener either believe it or not care enough to press. And he is most definitely a "playa" in modern vocabulary and "hound dog" in older speech. Either way, he will try to charm the pants off just about any female he encounters. Even being married to Amy, as he seems to be, does not matter.