For low-content & KDP publishers
Anyone can see the bestseller's rank.
Spyglass shows you how to beat it.
Paste a competitor's Amazon book. In about a minute Spyglass reads its reviews and hands you the complaints to fix, the gaps to fill, and the exact title & description words that pull its buyers to your book. No BSR guesswork. Nothing to install.
1 free report on signup · no card · works in any browser
Top complaints
- Pages bleed through
- Too few mazes
- Ages unclear
Content gaps
- No reward stickers
- Missing solutions page
- No name plate
Title keywords
- ages 4-8
- no bleed
- 100 pages
- gift
That's the whole point: not a number to interpret — a to-do list for your next book.
A rank number is where other tools stop.
It's where Spyglass starts.
Most KDP research tools — the browser extensions and BSR overlays — are great at telling you that a book is selling. They go quiet on the only question that makes you money: so what do I publish?
A BSR overlay / extension gives you
- ×A sales-rank number sitting on the page
- ×An estimated-sales guess
- ×A daily niche list everyone else also got
- ×Then you're on your own to design the book
KDP Spyglass gives you
- ✓The real reasons buyers leave 1- & 2-star reviews
- ✓The content gaps the bestseller left wide open
- ✓The exact title keywords & description phrases to use
- ✓A written “do this next” plan for your book
Numbers tell you a niche is hot. Spyglass tells you how to win it.
Three tools, one login — built to turn research into a published book.
Competitor gap reports
Don't just see the rank — see why it ranks and how to outdo it. We read the reviews and hand you the complaints, gaps, and title/description phrases that win. On demand.
Opportunity scoring
Score any niche you want by demand vs. competition — not a generic daily list everyone else gets too. Sort by opportunity, export to CSV. Credits never expire.
Weekly trends digest
Catch rising kids & seasonal themes before they hit every BSR chart — pulled weekly, each with a one-line note on the book angle to publish.