Chris Wraight

Not Graeme Lyon.

In all seriousness, Chris Wraight is a newer Black Library writer, and so far he doesn't disappoint.

His works so far consist of:

Battle of the Fang, a rather awesome Space Marine Battles novel about the Space Wolves fighting their traitor nemesis, Magnus the Red, and the Thousand Sons on Fenris.

Wrath of Iron, another Space Marine Battles novel, where the Iron Hands fight the forces of Slaanesh while being extremely awesome, though also being massive dicks in the process. Nice to see the Iron Hands getting some time in the spotlight.

Iron Company, a WHFB novel I haven't read. Also Sword of Justice and Sword of Vengeance, both are pretty damn good WHFB books focused on Ludwig Schwarthelm and Kurt Helborg, both are pretty damn badass.

Kraken, a Space Wolves short story that I haven't read yet but looks awesome.

Brotherhood of the Storm, a recent limited edition Horus Heresy novella about the White Scars and the event that caused Horus to mistakenly assume the Khan would join him.

Scars, a full length Horus Heresy novel following the Khan as he decides whether to side with Horus or the Emperor.

He has a Space Wolves short story and a full Space Wolves novel, Blood of Asaheim, out and they're both pretty good.

Really quite a good writer.