• ...you love large-scale military science fiction and epic space battles.
• ...you are a fan of the Horus Heresy series and want to witness a pivotal, shocking moment in the storyline.
• ...you appreciate stories of brotherhood, betrayal, and desperate courage against impossible odds.
• ...you want to read what many fans consider one of the absolute best novels in the entire series.

• The Ultimate Betrayal: Witness the precise, brutal, and shocking moment when one Space Marine Legion turns on another. The story captures the disbelief and horror of the Ultramarines as their world is torn apart.
• Massive-Scale Warfare: Experience the Battle of Calth from multiple perspectives, from the Legion command down to the individual soldiers on the ground, as an entire planet becomes a warzone.
• The Ultramarines Tested: See how the famously stoic and strategic Ultramarines react when their logic and planning are shattered by utter chaos.
• Dan Abnett's Masterful Storytelling: Enjoy a fast-paced, visceral, and unforgettable narrative from a master of the genre.

• A rapid-fire, almost documentary-style narrative that switches between different viewpoints to build tension and chaos.
• Incredibly detailed and visceral action sequences that put you right in the middle of the battle.
• A deep dive into the doctrines and mindset of both the disciplined Ultramarines and the fanatical Word Bearers.
• A story that is less about individual heroes and more about the cataclysmic experience of an entire Legion under attack.

Know No Fear is widely regarded by fans and critics of the Horus Heresy series as a masterpiece and a high point of the saga. It is often cited as the definitive account of the Calth betrayal. Author Dan Abnett is a legend among Black Library readers, and this novel is considered one of his finest works, praised for its unique narrative structure and breathtaking action.