The first in the Earthclan books. For some reason, I really like the entire concept of the universe Brin made here. Earth against the Galaxy, with a little helping tree branch from our friends (teheheh). The investigation the humans did, trying to figure out what was going on was reminiscent of a Lije Baley/Daneel Olivaw novel, (ref. Caves of Steel, The Naked Sun, etc.), and was really interesting. The most interesting characters in his novels, I find, are the aliens, but for some reason, he doesn't spend enough time on them.