My favorite book from Halo Series is The Flood and First Strike. Only problem is that I do not own a Xbox 360 but I play the Halo Series at my friend's house. Halo 2's storyline is soooooo long and the pace is sooo auggghhhh (zombie sound, reference from Electric Playground with Tommy and Victor reviewing Resident Evil Zero).
I love the series. I just got them for Christmas. I'm currently reading "Ghost of Onyx"
My favorite so far, well, it's a tie between "Contact Harvest" and "First Strike". I did not like "The Flood". It's a necessary evil but, the book reads more like a transcript of someone playing the game. Dietz was a greenside Corspman so he knows just enough about the infantry to get himself into trouble and not enough to get himself out. Nylund is the superior writer. The only things that bug me are some of the terms. Like Marines (supposedly there is a direct lineage from US) referring to eachother as soldiers and everyone salutes everyone else at every moment they get. Just a minor irritation.
I'd like to see more books by Staten (Harvest).
I think they are at the most, "ok" books. They're definately not the best written pieces of work out their but they did push some goodness into the Halo story. Also if any of you guys are wondering, my gamertag for Live is Zorn507R if yall ever wanna play some Halo 3 (or 2)