In between Gaunt’s Ghosts, Inquisition and Horus Heresy books, Dan’s also found time to write some standalone titles (though they’re usually linked to at least one of his series). Titanicus is one of the best, showing a world at war from the ground level and the towering perspective of the Imperium’s god-machines.
When the vital forge world of Orestes comes under attack by a legion of Chaos Titans, the planet is forced to appeal for help. The Titans of Legio Invicta, although fresh from combat and in desperate need of refit and repair, respond, committing their own force of war engines to the battle. As the god-machines stride to war, the world trembles, for the devastation they unleash could destroy the very world they have pledged to save.