I was hoping to learn a bit more about the Rookie from ODST for a blogging project I'm planning. So I decided I'd read Halo: Helljumper in the hopes that I would. Unfortunately Helljumper isn't about the Rookie at all. It's about Dutch and Romeo, two of the other Helljumpers from your squad in ODST.
Romeo and Dutch are best friends. But Dutch's girlfriend, who is also an ODST, was injured and is stuck planet-side. She wants Dutch to take a different position so they can be together. Unfortunately, Dutch doesn't tell Romeo about this (or about his decision) until they are fighting for their lives.
I also have to add, my favourite part of the graphic novel was when a pair of jackals was trying to figure out what was being said on a Helljumper's comm. They don't realize that "blow" means more than just "a strong breeze."
Overall, while I've never really liked Romeo (moreso from the game. He was okay here), I thought this was a great story that doesn't take long to read. It gave a little more background to the game and was just plain fun.