This is a free, promotional adventure for the Dark Heresy RPG. It includes basic rules, a short adventure, and four sample characters.
From the back cover:
Make ready your chainsword, strap on your bolter, and say a prayer to the God-Emperor, for Warhammer 40,000: Dark Heresy is here. Step into the the role of an agent of the inquisition, hunting out and destroying the foul and twisted influence of Chaos.
This free booklet gives you a taste of the fantastic new roleplay game from award winning publisher Black Industries. The long awaited Warhammer 40,000 Roleplay: Dark Heresy will be availabla from February 2008.