I had high expectations based on reviews, but this was a little disappointing. I see why people like it: the writing is sharp and snappy and funny and the main characters' interactions are compelling and often charming, even when (especially when) they're sniping at each other. And the author has an impressive ability to evoke high school social dramas. But the alien stuff -- can you even call it worldbuilding when it's collapsing in on its own illogic? -- is not remotely believable. It's not internally consistent (the telepathy bit in particular); the logic of how the DoD monitors/controls the aliens is pretty silly (if they're such powerful shape shifters then for goodness' sake, they could buy themselves some new identities); and the bad aliens are ridiculous caricatures of bad guys. I read the first half of the book with interest, really impressed. I read the second half with a curled lip and increasing impatience.