My 2 cents is that Ghosts of Onyx was awesome. I absolutely loved the story because it sets up what we are gonna have to deal with in Halo 3, and answers the question that we will not get to see the other spartans in the game, except maybe in an end game cinematic. It answers a lot of questions. And the plot blows the reader away. I love all the Halo books, and those complaining need to step away from their xboxes for a few minutes and get some perspective, because the books are designed to build on the Halo-verse, not tell us anyhting we didn't already know about the games.
Finis Coronat Opus! - "The End Crowns the Work!"
"Seek freedom and you shall be enslaved by your desires. Seek discipline and there you shall find your liberty." - Bene Gesserit Precept, Chapterhouse: Dune