Here's a statement from Tor Books about the third novel by Karen Travis that's set in our beloved Halo universe:
'Tor Books and 343 Industries™ are excited to announce the forthcoming January 2014 publication of Halo: Mortal Dictata by #1 New York Timesbestselling author Karen Traviss.
Traviss has penned #1 bestselling novels in the Star Wars universe, as well as bestselling novels for the Gears of War franchise, and this winter she completes the “Kilo-Five” story, her trilogy set in the Halo® universe.
Based on the universe and characters from the multimillion copy selling Xbox video games, Mortal Dictata completes a trilogy set in the Halo universe, and ties into the story of Halo 4, which launched in November 2012.'
I haven't read any of the prior novels but that girl on the front seems a little out of place....?