Forge World has Re-Released the Siege of Vraks, but this time in one volume.
The new book takes into account 7th edition and having seen it at the Horus Heresy Weekender, I can tell you it is pretty slick.
From Forge World:
Imperial Armour – The Siege of Vraks gathers together and presents afresh the story of this monumental conflict, previously published in Imperial Armour Volumes Five, Six and Seven. As well as extensive background information on the siege and the forces engaged in it, such as the Red Scorpions Space Marines Chapter, the Grey Knights and the World Eaters Chaos Space Marines, this 288-page, full colour hardback book contains updated rules and army lists for the Death Korps of Krieg and the Renegades of Vraks. Also included are the heraldry and iconography of the forces deployed to Vraks and rules for the lords and heroes of each faction, including Inquisitor-Lord Hector Rex and the vile Mamon, Daemon Prince of Nurgle.
In order to use this book, you will need the Warhammer 40,000 rulebook. This book is available to pre-order today for delivery from Friday 13th February.
You can get yours on the Forge World website. £57 or $87.