Iron Hands - my second Warhammer 40,000 novel, first published in 2004 - is available again as part of the Black Library's Print on Demand range.
The book's been given a face lift and you can order it direct from the publisher here. And in case Adrian Smith's fantastic artwork isn't enough to sell it to you, here's the blurb from the back cover:
With Abaddon the Despoiler’s Thirteenth Black Crusade engulfing the galaxy, Iron-Father Gdolkin and his company are pulled away from the defence of Medusa to honour an ancient oath to the Adeptus Mechanicus. A trail of clues leads Gdolkin to a long-lost world, home to an ancient weapon that might turn the tide of war in the Imperium’s favour. But for Gdolkin, the quest is personal, as this mysterious planet might also contain the answer to the oldest mystery of the Iron Hands Chapter... the resting place of the Primarch Ferrus Manus.