Storm of Iron: Warhammer 40,000 (Unabridged‪)‬

Winner of the Readers' Choice Poll.

Hell has come to Hydra Cordatus. A massive force of terrifying Iron Warriors have invaded the planet and laid siege to its mighty Imperial citadel. Can the defenders hold out? And just what do these ancient traitors want with such a seemingly insignificant world?

Listen to it because....

It's one of the true Black Library classics, and one of the first novels to make the bad guys the heroes...and it introduced the mighty Warsmith Honsou, who went on to plague the Ultramarines across plenty of novels. It also pits the Iron Warriors against their oldest foes, the Imperial Fists, which is always a guarantee of quality action.

The story:

On the nightmare battlefields of the far future, few foes spark more fear and dread than the Chaos Space Marines. Nurturing a hatred that is millennia-old, they attack without mercy, spreading terror and destruction in their wake. Now hell has come to Hydra Cordatus, for a massive force of terrifying Iron Warriors, the brutal assault masters of Chaos, have invaded the planet and lain siege to its mighty Imperial citadel. But what prize could possibly be worth so much savage bloodshed and destruction—and how long can the defenders possibly hold out?

Written by Graham McNeill. Narrated by Michael Geary. Approximate running time 11 hours and 4 minutes.