Dawn of Fire: Sea Of Souls written by Chris Wraight.
The mighty fleets of the Indomitus Crusade face terrors and dangers beyond imagining. As Guilliman’s crusade marches forth, bringing the Emperor’s light to thousands of worlds, Fleet Secundus is headed for the darkest dark – the Eye of Terror itself.
Along with warriors of the Adepta Sororitas and the Adeptus Astartes, the Imperial Navy battle cruiser Judgement of the Void pushes deeper into contested space. But as their journey unfolds, the forces of Chaos close in, and a battle for survival is about to begin – one which has ramifications not just for Fleet Secundus, but for the future of the galaxy itself.