All markets · 30-day comparable periods
Empty time buckets are shown as zero and retain their sample size; they are not interpolated by AI.
These are the records counted in the current prevalence numerator.
Nina Vale
Inspect evidenceTom Arlen
Inspect evidenceEmily Shiner
Inspect evidenceIsolated House increased from 20% to 27.3% across comparable 30-day windows, a 7.3 percentage-point upward movement. The feature currently appears in 2 tracked market segments.
Amazon Bestsellers has the highest current prevalence at 40% (2 of 5), while Amazon New Releases is lowest at 16.7% (1 of 6).
Inspect the matching covers alongside non-matching covers from the same source types. Look for whether isolated house co-occurs with particular typography, imagery, colour, or subgenre choices before treating this as a durable convention.
Current window: 3 matching covers from a sample of 11.
Previous window: 2 matching covers from a sample of 10.
7.3 percentage points of measured upward movement.
This describes the tracked genre sample only. It does not establish why the feature changed, whether it improves sales, or whether it represents the entire book-cover market.