BCBook Cover
Intelligence
Import covers
All trendsMeasured tag / mysterious
mood / insufficient

Mysterious

All markets · 7-day comparable periods

+50percentage
points
Current prevalence50%2 matching covers / n=4
Previous period0%0 matching covers / n=2
Signal stateinsufficientRule-based classification
As ofAug 30, 2026Latest evidence check
01 / Current window

Observed prevalence

Aug 24n=1Aug 26n=0Aug 27n=1Aug 28n=0Aug 29n=0Aug 30n=2

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

02 / Market separation

Source breakdown

Amazon Bestsellers2 / 2100%
Amazon New Releases0 / 20%
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
exploratory confidence
Interpretive summary
Mysterious increased from 0% to 50% across comparable 7-day windows, a 50 percentage-point upward movement. The current matches are concentrated in Amazon Bestsellers.
Market context

Amazon Bestsellers has the highest current prevalence at 100% (2 of 2), while Amazon New Releases is lowest at 0% (0 of 2).

What to investigate

Inspect the matching covers alongside non-matching covers from the same source types. Look for whether mysterious 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 4.

Previous window: 0 matching covers from a sample of 2.

50 percentage points of measured upward movement.