BCBook Cover
Intelligence
Import covers
All trendsMeasured tag / silhouette
imagery / declining

Silhouette

All markets · 30-day comparable periods

-11.8percentage
points
Current prevalence18.2%2 matching covers / n=11
Previous period30%3 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 Bestsellers1 / 520%
Amazon New Releases1 / 616.7%
Traditional Publishers0 / 0—
Indie Authors0 / 0—
03 / Underlying evidence

2 matching covers.

These are the records counted in the current prevalence numerator.

04 / Evidence interpretation

What it may mean.

Deterministic previewevidence-interpreter-v1
moderate confidence
Interpretive summary
Silhouette decreased from 30% to 18.2% across comparable 30-day windows, a 11.8 percentage-point downward movement. The feature currently appears in 2 tracked market segments.
Market context

Amazon Bestsellers has the highest current prevalence at 20% (1 of 5), while Amazon New Releases is lowest at 16.7% (1 of 6).

What to investigate

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

Facts supplied to the interpreter

Current window: 2 matching covers from a sample of 11.

Previous window: 3 matching covers from a sample of 10.

11.8 percentage points of measured downward movement.