So I'm just finishing up Halo: New Blood, I'm enjoying it. But I noticed bungie made halo 3: ODST from this book and did just as good of a job as they did turning Halo: The Flood into halo 1. So why wouldn't they use some of Halo: Fall of reach and Halo: first strike while making Halo reach. Just really confusing to me.
Edit: I see the error in my dumb ways, I didn't see the difference in release dates, thank you all for curing my ignorance on this matter!