Red / black palette

All markets · 30-day comparable periods

-10.9percentage
points

Current prevalence9.1%1 matching covers / n=11

Previous period20%2 matching covers / n=10

Signal statedecliningRule-based classification

As ofAug 30, 2026Latest evidence check

01 / Current window

Observed prevalence

Aug 5n=1Aug 10n=2Aug 15n=2Aug 20n=1Aug 25n=2Aug 30n=3

Empty time buckets are shown as zero and retain their sample size; they are not interpolated by AI.

02 / Market separation

Source breakdown

Amazon Bestsellers0 / 50%

Amazon New Releases1 / 616.7%

Traditional Publishers0 / 0—

Indie Authors0 / 0—

03 / Underlying evidence

1 matching covers.

These are the records counted in the current prevalence numerator.

▲ ▲▲ ▲ ▲▲Someone in the PinesC. A. Mercer

Amazon New Releases

Someone in the Pines

C. A. Mercer

Inspect evidence

04 / Evidence interpretation

What it may mean.

Deterministic previewevidence-interpreter-v1

exploratory confidence

Interpretive summary

Red / black palette decreased from 20% to 9.1% across comparable 30-day windows, a 10.9 percentage-point downward movement. The current matches are concentrated in Amazon New Releases.

Market context

Amazon New Releases has the highest current prevalence at 16.7% (1 of 6), while Amazon Bestsellers is lowest at 0% (0 of 5).

What to investigate

Inspect the matching covers alongside non-matching covers from the same source types. Look for whether red / black palette co-occurs with particular typography, imagery, colour, or subgenre choices before treating this as a durable convention.

Facts supplied to the interpreter

Current window: 1 matching covers from a sample of 11.

Previous window: 2 matching covers from a sample of 10.

10.9 percentage points of measured downward movement.