Worth reading if you want an entry that delivers combat and deepens the lore surrounding the Imperium Secundus subplot. Track of Words praises it as everything a Horus Heresy book should be, while Civilian Reader highlights its solid storytelling despite a slightly muddled conclusion. Readers seeking fast-paced action may find the pacing too deliberate.

Written for adults. The narrative focuses on brutal siege warfare and psychological trauma, which aligns with the mature tone of the broader Horus Heresy saga. It does not contain content appropriate for younger audiences.

Guy Haley

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Reviewed

November 14, 2026

Read Time

7 min read

Our age bandAdult

Reader rating

4.6 · 1,111 Amazon ratings, as of Nov 2026

reader ratings, not a LuvemBooks score

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Book 34 · The Horus Heresy

Pharos

Pharos by Guy Haley Review: A Night Lords Siege

by Guy Haley

Guy Haley’s Pharos delivers a tense, character-driven siege narrative that stands out for its focused scope within a sprawling science fiction saga. The novel focuses on the desperate defense of Mount Pharos against the Night Lords Legion. It serves as a compelling, self-contained entry for dedicated fans of the Horus Heresy timeline.

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Our age band: Adultbrutal siege warfare · psychological trauma

LuvemBooks Verdict

Best for

Fans of the Horus Heresy series seeking a focused story that explores the contrast between organized Ultramarine tactics and the Night Lords' chaotic brutality.

Worth it if

Worth reading if you want an entry that delivers detailed tactical combat and deepens the lore surrounding the Imperium Secundus subplot.

Skip if

Skip it if you require rapid, multi-front plot progression or have not read the preceding short stories and novels that establish the setting.

Where reviewers agree and split

Readers rate it 4.6 on Amazon. The reviews we read that discuss it in depth agree:

Positive
Civilian Reader · Book blog: recommended for fans despite minor plot confusion
Positive
Elitist Book Reviews · Book blog: praises premise and subplot while building series momentum
Positive
Adventures with Peps · Book blog: refreshingly rich character-driven narrative balances action and lore
Positive
Track of Words · Book blog: everything a Horus Heresy book should be

Overall verdicts are our summary of each review we read, from its headline, rating and conclusion.

What readers & critics say

Civilian Reader and Elitist Book Reviews praise the novel's scope and compelling combat, while Adventures with Peps and Track of Words highlight its strong character dynamics and atmospheric tone. StoryGraph notes it serves as a solid first full-length entry for Haley, though requires prior reading.

Sources: Civilian Reader, Elitist Book Reviews, Adventures with Peps, Track of Words

4.6from 1,111 Amazon ratings, as of Nov 2026— reader ratings, not a LuvemBooks score

The Horus Heresy reading order

Book 34 of 64 books

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Guy Haley’s Pharos isolates the defense of Mount Pharos from the wider galactic war. The book succeeds as a focused entry that deepens the Horus Heresy timeline, particularly for readers who appreciate tactical combat and morally complex antagonists. However, the narrow scope and deliberate plot ambiguities may frustrate those seeking rapid, multi-front progression or a fully resolved conclusion.

Is it worth reading?: Worth reading if you want an entry that delivers combat and deepens the lore surrounding the Imperium Secundus subplot. Track of Words praises it as everything a Horus Heresy book should be, while Civilian Reader highlights its solid storytelling despite a slightly muddled conclusion. Readers seeking fast-paced action may find the pacing too deliberate.
Similar books: Readers who enjoy this focused story and tactical military sci-fi will likely appreciate Legion by Dan Abnett, which explores similar themes of military doctrine and brotherhood. The First Heretic by Aaron Dembski-Bowden offers a compelling look at the early stages of the Horus Heresy with deep character work. For those who prefer character-driven space operas with unique settings, The Long Way to a Small, Angry Planet provides a different but equally immersive tone.
Who should read this?: Best suited for dedicated fans of the Horus Heresy series seeking a focused story that explores the organized Ultramarine tactics and the Night Lords' chaotic brutality. It also appeals to military fiction readers who enjoy combat and deep lore expansion without needing to follow a sprawling galactic war.
What age is it for?: Written for adults. The narrative focuses on brutal siege warfare and psychological trauma, which aligns with the mature tone of the broader Horus Heresy saga. It does not contain content appropriate for younger audiences.
How does the author handle pacing and suspense?: Reviewers generally find the pacing deliberate but effective for building suspense around the impending siege. Elitist Book Reviews notes that the author carefully withholds information to heighten tension, particularly during the intense combat. However, Civilian Reader points out that the narrow geographical scope can feel slow to some, with the conclusion arriving with intentional ambiguity.
What did critics say about the ending?: The novel concludes with open-ended moments that reflect the disorder of the siege rather than providing a neatly tied resolution. Civilian Reader found the ending very good but noted it might have been deliberately unclear, adding to the tension. This approach rewards readers comfortable with unresolved military outcomes and focuses on the emotional core of the wardens and conflicted Night Lords invaders.
Where should I start in the series?: Pharos follows Dan Abnett’s The Unremembered Empire and continues the Imperium Secundus subplot. It also continues events from Haley’s personal story A Safe and Shadowed Place. While it operates as a standalone siege, reading the preceding lore will significantly enhance the context for the wardens’ struggle.

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Is it worth reading?

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How does the author handle pacing and suspense?

What did critics say about the ending?

Where should I start in the series?

Summarize this book

The novel focuses on the desperate defense of Mount Pharos against the invading Night Lords Legion. Roboute Guilliman directs Sanguinius to establish a new capital, Imperium Secundus, atop the ruins of Sotha, assigning Barabas Dantioch and Alexis Polux as wardens. As the Night Lords launch a devastating assault, the narrative explores the clash between highly organized military doctrines and chaotic terror tactics.

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Our Review

We review the evidence: reader verdicts, gathered and weighed with AI assistance and edited by LuvemBooks, rather than one reader's first-hand take.

Guy Haley’s Pharos delivers a tense, character-driven siege narrative that stands out for its focused scope within a sprawling science fiction saga.

Pharos (The Horus Heresy) by Guy Haley front cover

Pharos Plot Summary

Roboute Guilliman convinces Emperor Sanguinius that Terra has fallen and directs him toward a mysterious artifact on the distant world of Sotha. The two leaders establish a new capital called Imperium Secundus atop the ruins of Mount Pharos to serve as a beacon of hope.

Meanwhile, the Night Lords Legion watches from the shadows and prepares to launch a devastating attack on the tower. Barabas Dantioch and Alexis Polux are assigned as wardens to protect the site.

The novel focuses heavily on the siege of the tower as the Night Lords attempt to destroy the last hope for humanity. The book opens with the tension of an impending assault on a heavily fortified position.

The narrative explores the desperate defense of a strategic location against overwhelming odds. Sanguinius rules from Macragge while the Warmaster’s armies ravage the rest of the galaxy.

Pharos Series Context

Pharos was originally released as a digital-exclusive in 2015 before receiving a traditional publication in 2017. It serves as a direct sequel to Dan Abnett’s The Unremembered Empire and continues the wider Imperium Secundus subplot.

The narrative picks up threads from Haley’s own short story A Safe and Shadowed Place. Track of Words notes that the novel marks a clear turning point in the arc because of the Night Lords’ intervention.

The story functions as a self-contained siege without requiring readers to navigate the massive, sprawling main series. Elitist Book Reviews commends Haley for keeping the plot relatively self-contained compared to other entries.

The book carries a mysterious numbering as the 34th entry in the series. It follows the publication of Deathfire, which holds the 32nd position.

Pharos Character Focus

The novel shifts its primary focus away from the overarching galactic war to examine the mechanics of a brutal space station assault. CivilianReader highlights the solid storytelling and restrained descriptions that accompany the decent action sequences.

The book explores the contrast between the highly organized Ultramarines and the chaotic, terror-focused tactics of the Night Lords. Track of Words praises the sense of tragedy that runs through the episode and the well-paced plot.

The author captures a genuine sense of humanity among the characters, even among the most appalling villains. The relationship between the two wardens and the conflicted Night Lords brothers provides a compelling emotional core.

Haley brings the Night Lords to life as terrifying yet strangely relatable antagonists. The conflicted birth-brothers Kellendvar and Kellenkir stand out among the invaders.

Pharos Critical Reception

Reviewers generally regard the novel as a very good addition to the series despite its narrower scope. CivilianReader found the ending to be very good, though slightly muddled in its execution.

The book blogger behind CivilianReader noted that the conclusion might have been intentionally obscure. This deliberate ambiguity adds to the chaotic nature of the siege.

Elitist Book Reviews found the furious zero-gravity space station combat earlier in the novel to be compelling. Elitist Book Reviews notes that the author does not reveal too much about the book in advance.

The review highlights the furious zero-gravity space station combat as a compelling highlight. This careful pacing builds suspense throughout the narrative.

Pharos Worth Reading

The book delivers a tense, character-driven siege narrative that stands out for its focused scope within a sprawling science fiction saga. It ticks the right boxes for fans of the Horus Heresy series by capturing the specific tone of the franchise.

Track of Words notes that it ticks all the right boxes for a Heresy novel. The author captures the grim atmosphere that defines the broader saga.

Track of Words describes the novel as 'everything a Heresy book should be'. The focus on characters and the isolation of the setting provides a refreshing change of pace.

Fans of military science fiction and detailed tactical combat will find the siege highly engaging. Readers looking for rapid plot progression across multiple fronts may find the pacing deliberate.

Sources & Further Reading

The key facts and claims in this review are grounded in the retrieved, verified sources listed below.

1
Pharos (Novel) - Warhammer 40k - Lexicanum
wh40k.lexicanum.com
2
Review: PHAROS by Guy Haley (Black Library) | Civilian Reader
civilianreader.com
3
Pharos – Guy Haley – Track of Words
trackofwords.com
4
Review: Pharos by Guy Haley - Elitist Book Reviews
elitistbookreviews.com
5
Pharos | Book by Guy Haley | Official Publisher Page | Simon & Schuster
simonandschuster.com
6
Pharos (The Horus Heresy) - Haley, Guy: 9781784964917 - AbeBooks
abebooks.com
7
Pharos Audiobook by Guy Haley
audible.com
8
Adventures with Peps
Adventures with Peps

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Adult

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3 content notes · who it suits

Content to know about

brutal siege warfare

psychological trauma

moral ambiguity

Best for: Adults — themes of brutal siege warfare and psychological trauma.

Skip if you require rapid, multi-front plot progression or have not read the preceding short stories and novels that establish the setting.

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