Category rankings on major retail platforms are among the most misunderstood signals in publishing, claimed aggressively by some authors and dismissed entirely by others. Both positions miss what the mechanism actually is and what it can reasonably support.
Royston G King works with founders and executives on book projects and is direct about the limits. A Forbes 30 Under 30 Monaco honouree, University of Southern California alumnus accepted into Columbia University, author of several business titles, and Entrepreneur contributor, he founded Master Scaling in 2018 and Quantum Scaling Partners as its selective publishing arm. A category ranking, he notes, reflects position within one browse category recalculated on recent sales activity, not a claim about outselling every title on the platform.
The catalogue contains thousands of categories and subcategories, some broad and heavily trafficked, others narrow and specific. A title can reach the top position within a well-defined category on a fraction of the volume required to place on a broader list. This is a genuine structural feature rather than a loophole, and it exists because the categories are designed to help readers find titles matched to their interests.
What this supports, and what it does not, is worth separating carefully.
It supports a claim about category fit. A book that reaches the top of a narrow, well matched category has demonstrated that it connects with the audience it was built for. For a title aimed at a defined professional readership, that is meaningful information.
It does not support broad superlative claims. Describing a title as a bestseller without naming the category invites a reader to infer something the ranking does not establish. King’s position is that this is where authors create problems for themselves, because the inflated version is easily checked and the correction is more damaging than the accurate claim would have been modest.
It is temporary. Rankings recalculate frequently. A position held briefly is not a durable attribute, and describing it as a permanent characteristic misrepresents the mechanism.
It is not the asset. King argues the book itself is the durable credential, and the ranking is a marketing event around its release. Quantum Scaling Partners orients client projects around the former, because a well-made book continues functioning as a credential for years while a ranking is a moment.
Several practical points follow for authors selecting categories. Choosing a category that genuinely matches the book’s content and audience serves readers and produces sustained sales from people who wanted that title. Choosing a category selected purely
for low competition, with poor fit to the actual content, produces a brief position and a stream of readers who bought the wrong book, which shows up in reviews.
Timing affects outcomes considerably. Demand in most non-fiction categories follows recognisable patterns tied to industry calendars, budget cycles, and gift-giving periods. A concentrated release during a period of natural demand can move a title within a narrow category on modest volume.
Verification is the practical safeguard King recommends for anyone intending to reference a ranking publicly. Capturing dated screenshots at the time a position is held provides the documentation that editors and fact-checkers increasingly request, and its absence is a common reason otherwise sound announcements are declined by publications with real editorial standards.
King’s summary is that category ranking is a legitimate but limited signal, best stated precisely and left to stand on its own. There is also a reader-trust dimension that operates independently of any platform rule. Buyers who encounter an inflated claim and check it form a judgment about the author that extends well beyond the book, and in professional categories where the book exists to establish credibility, that judgment defeats the purpose of having written it.
The claim that survives scrutiny is the specific one naming the category. The claim that invites scrutiny is the general one, and any advantage it appears to offer disappears the moment someone checks.
About Royston G. King
Royston G. King writes and advises on brand authority, strategic publicity, and reputation management. Learn more about his work at his website. You can also follow his insights on LinkedIn, Instagram, and YouTube.
