Games Workshop have published a gamebook - Hive of the Dead, set in a 40K millieu.
Now, Space Marines aside, have you ever wondered how you would cope in a zombie apocalypse? Would you be food for the Undead, or the hero of a post-apocalyptic wasteland? Well, now you can find out. Hive of the Dead, the first ever Warhammer 40,000 gamebook, is released today. This is not a normal book. Rather than reading it in a traditional linear manner, the end of each story section will present you with a number of options, allowing you to control the direction of the story with the decisions you make. You will also need a pencil and a standard six-sided dice (if you're anything like us, there are probably a dozen down the side of your sofa) in order to combat the Undead denizens of Hive Septus.
It's a £13, Print On Demand book only available from the Black Library webstore. Sounds pricey for POD but it's a claimed 288 pages so might be a big beast.
Thanks to Scott H for the headsup.