Book Review: The Solar War by John French
The Siege of Terra Book One
(From the perspective of a newcomer to the Warhammer universe)
Rating: 4.5/5 Stars
As someone still finding their bearings in the vast, gothic expanse of the Warhammer 40,000 universe, diving into The Solar War by John French was both exhilarating and, at times, overwhelming—but in the best possible way. As the first novel in the Siege of Terra series, and a direct continuation of the sprawling Horus Heresy saga, The Solar War feels like walking into the final act of a galactic tragedy centuries in the making. And yet, surprisingly, even with only a basic understanding of the universe and having read only a few prior entries (notably Horus Rising and Know No Fear), I found myself gripped, awed, and emotionally invested by the sheer scale and atmosphere of what French achieves here.
A Prelude to the End of Everything
The Siege of Terra is the capstone to decades’ worth of lore that Warhammer 40K fans have consumed and obsessed over for years. It’s the climax of the Horus Heresy—a betrayal so profound that it reshaped the galaxy and forever defined the grim darkness of the far future. In The Solar War, Horus, the traitorous Warmaster and once-beloved son of the Emperor of Mankind, has finally arrived at the gates of Terra itself. After years of brutal warfare and cosmic treachery, his forces have crossed the stars and now seek to break the final bastion of the Imperium.
What this means in practice is that John French is tasked with beginning a slow, methodical unraveling of the Imperium’s defenses—and he does so with chilling elegance. The book is not a bombastic, explosion-filled opener, but a brooding, ominous escalation of tension and dread. Think of it like the opening moves in a galactic chess match: the enemy has entered the board, and the players begin maneuvering.
A Universe of Perspective
What makes The Solar War so approachable—even for someone relatively new—is the structure French employs. Rather than drowning readers in monolithic exposition, he guides us through multiple characters and viewpoints across both sides of the conflict. Some of these characters are major figures (like Rogal Dorn, primarch of the Imperial Fists), while others are more grounded—fleet commanders, mortal agents, or even those on the periphery of the action.
This mosaic-style storytelling is what kept me engaged. You don’t need to know every planet or every past betrayal to feel the weight of what’s happening. You feel it in the way characters talk about the coming storm. You feel it in the contrast between the calculated, chilling demeanor of the Traitor forces and the desperate, righteous defiance of the defenders. And you feel it most in the way French writes space warfare—not just as action, but as psychological collapse. Space becomes suffocating. The void is not just a backdrop, but a character in itself, pressing in on all sides.
A Style Suited to the Epic
John French’s prose can be dense, sometimes bordering on poetic, but for the setting, it works. The Warhammer universe thrives on grim grandeur. Cities span continents, ships blot out stars, and every character seems to carry the burden of a thousand years of warfare. French leans into that with rich, philosophical passages and meditations on duty, sacrifice, and inevitability. There were moments where I had to re-read passages to grasp their full implications, but instead of feeling lost, I felt more immersed—like peeling back the layers of a deeply alien, deeply human world.
This does mean, however, that those who prefer straightforward action may find certain parts slow. This is not a Michael Bay blockbuster in space. The battles, while breathtaking, are often more about attrition and maneuvering than climactic clashes. And yet when action comes, it’s thunderous. Whether it’s space marines descending into battle like gods of war, or traitor fleets performing warp-jumps into fortified bastions, the imagery is staggering.
Themes of Doom, Loyalty, and Faith
What surprised me most was how philosophical The Solar War often is. At its heart, this is a story about fate versus free will. The Imperium believes it can hold the line—can prevent the galaxy from falling into darkness. And yet, there’s this constant undercurrent that all their efforts may be futile. Characters debate whether they fight for something real, or just for the illusion of hope.
Rogal Dorn, in particular, stood out. As the architect of Terra’s defenses, he’s a fascinating mix of cold logic and desperate resolve. His interactions with Malcador the Sigillite and other figures of the Imperium feel like something out of Oppenheimer—men who understand the scale of destruction they face, but still build the bomb anyway.
On the other side, Horus barely appears, but his influence is everywhere. His lieutenants—especially Maloghurst, the twisted advisor—are haunted figures, equal parts brilliant and broken. The traitor forces don’t come across as mustache-twirling villains, but as zealots, pragmatists, and lost souls who have become the instruments of ruin.
Accessibility for New Readers
Make no mistake: this book is not a casual introduction to the Warhammer 40K universe. It assumes a degree of familiarity with major players, factions, and events. And yet, I’d argue it can be a starting point—provided you’re comfortable being thrown into the deep end. If you’ve read even just a few of the early Horus Heresy books, or done some background reading (even through wikis or YouTube lore videos), you can find your footing. French provides enough context through dialogue and internal monologues that you begin to piece together the grand mosaic.
And there’s something truly powerful about being a newcomer and seeing Terra—the shining jewel of humanity—under threat. It allows you to empathize with the billions of innocents who live in ignorance of the horrors approaching. In that sense, the reader shares their perspective: the awe, the terror, and the creeping realization that the future is not guaranteed.
Final Thoughts
The Solar War is not a loud book—it’s a heavy one. It’s an atmosphere of dread before the storm. It’s the tightening of a galactic noose. For long-time Warhammer fans, it’s a rich and emotionally resonant payoff for years of build-up. For newer readers like myself, it’s a harrowing yet fascinating entry point into the apocalyptic scale and tragic grandeur of this universe.
If you’re new to Warhammer 40K and wondering whether you can dive in here—the answer is yes, if you’re willing to be patient, attentive, and open to awe. John French doesn’t write for ease; he writes for impact. And The Solar War leaves one.
By the final page, I wasn’t just reading about the Siege of Terra. I felt it. The crushing inevitability. The doomed courage. The endless war.
And I already know—I’ll be reading the next one.