I found another book by John Scalzi ("Old Men's War" and sequels). It's "Agent to the Stars". Scalzi wrote it for practice when he was starting out, with no intention of publishing, to see if he could actually write books. It led a subterranean life on the internet for a long time, got published in a limited edition, and now is out in mass market paperback.
It's a light-hearted, funny thing: benevolent aliens have come to our solar system, and, after spending a number of years studying us through television broadcasts, etc, want to make contact. The problem is, that they look like disgusting blobs of goo and communicate by means of smells that humans find nauseating. How not to scare humans off? They decide that Hollywood sets the stage for the whole world, so they hire a Hollywood agent to find a way to present them to humanity.
You can pick a lot of holes in the details, but it's not the sort of thing where this matters. It's a good story, well told, with lots of plot twists, and an amusing satire of the Hollywood scene.