01
Repetitive sentence structures
Several sentences use the same length, opening, or grammatical shape. Natural copy usually changes pace as the tension changes.
Example: “She must uncover the truth. She must face her past. She must save the town.”
Product guide
AI-Likeness Score Explained
What the 0–100 score means, which writing patterns affect it, and what happens when you use human-voice polish.
BookBlurb reviews a blurb for patterns that often appear in generated marketing copy. It returns an estimated score and a short list of phrases or patterns worth checking. Lower scores show fewer AI-like signals; higher scores show more of them.
Important: the score is an editing aid, not authorship proof. No detector can reliably determine who wrote a passage from the text alone. Use the flagged evidence to decide what to revise instead of treating the number as a verdict.
What Each Score Range Means
0–30
Reads human
The blurb shows fewer of the patterns commonly associated with generated copy. It usually has varied rhythm, concrete details, and a more particular voice.
31–60
Mixed signals
Some passages feel specific and natural, while others rely on repeated structures, broad claims, or familiar marketing language. Review the flagged phrases before publishing.
61–100
Likely AI-flagged
Several AI-like writing patterns appear together. The score is a prompt to revise the copy, not proof that a person or model wrote it.
The Six Signals We Review
One signal alone does not make a blurb sound artificial. Scores rise when several patterns repeat across the same passage.
02
Generic phrases
Broad phrases can fit almost any book and reveal little about this story's actual conflict, setting, or character.
Example: “A gripping journey that will keep readers on the edge of their seats.”
03
Lack of personal voice
The prose is grammatically clean but could belong to any author or genre. A stronger voice makes deliberate word choices and has a recognizable attitude.
Example: “An unforgettable tale of love, loss, and redemption.”
04
Overuse of adjectives
Stacks of intensifiers and descriptive words often replace evidence. One precise noun or verb is usually more convincing than three adjectives.
Example: “A breathtaking, powerful, deeply emotional, unforgettable story.”
05
Missing sensory or concrete detail
The copy describes themes instead of showing a place, object, action, or consequence the reader can picture.
Example: “Everything changes when a shocking secret comes to light.”
06
Formulaic rhythm and progression
The blurb moves through a predictable setup, escalation, and rhetorical-question ending without a surprising detail or change in cadence.
Example: “But when danger strikes, can she overcome the odds before it is too late?”
How Human-Voice Polish Works
- 1
Read the original
Polish starts from the selected blurb and its writing register, while keeping the core message and roughly the same length.
- 2
Rewrite the weak patterns
It asks for more specific, surprising, and particular language while reducing generic phrases, formulaic structures, and adjective-heavy copy.
- 3
Preserve your facts
The rewrite keeps the book's premise and the concrete details already supplied rather than inventing a different story.
- 4
Re-score the result
The polished version is analyzed again. You can compare the new score with the original and decide whether the voice actually improved.
Score a Blurb, Then Inspect the Evidence
Generate three variants, compare their scores and flagged phrases, and polish the version closest to your voice.
Try the book description generator →