Amazon Self Publishing Terminology Guide: Complete KDP Dictionary for Authors
Key Takeaways
- ✓BSR (Best Sellers Rank) under 100,000 typically indicates viable market demand across most KDP categories
- ✓KDP Select exclusivity provides 70% royalty rate vs 35% for wide distribution on books priced $2.99-$9.99
- ✓ACOS (Advertising Cost of Sales) should stay below 30% for profitable Amazon PPC campaigns
- ✓Browse nodes determine category placement - each book can select up to 2 categories during upload
- ✓Print-on-demand eliminates upfront costs but reduces profit margins by $2-4 per paperback compared to offset printing
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Essential KDP Pricing Strategy Terms
BSR (Best Sellers Rank) measures your book's sales performance within its category. A BSR under 50,000 in Books > Fiction indicates strong daily sales, while BSR over 500,000 suggests minimal movement.
Royalty Rate determines your earnings per sale. KDP offers 35% or 70% royalty rates for Kindle books, with the 70% rate requiring $2.99-$9.99 pricing and KDP Select enrollment in most markets.
List Price is your book's retail price on Amazon. For paperbacks, factor in printing costs ($2.15 for a 200-page 6x9 book) plus desired profit margin when setting list price.
KENP (Kindle Edition Normalized Pages) calculates page reads for KDP Select books. Authors earn approximately $0.0045 per KENP read based on the current KDP Select Global Fund distribution.
Expert Tip
Track your BSR daily using free tools like NovelRank. A sudden BSR drop (higher number) often indicates algorithm changes or increased competition, not necessarily poor performance.
Category and Competition Analysis Terms
Browse Nodes are Amazon's internal category codes. Each book selects 2 categories during upload, but Amazon may assign additional browse nodes based on keywords and content analysis.
Category Depth refers to competition levels within browse nodes. Categories with fewer than 1,000 titles offer easier ranking opportunities than saturated categories with 10,000+ books.
Keyword Difficulty measures how challenging it is to rank for specific search terms. Long-tail keywords (3+ words) typically show lower difficulty scores and higher conversion rates.
ASIN (Amazon Standard Identification Number) is your book's unique identifier on Amazon. ASINs never change and are used for tracking sales data, reviews, and advertising campaigns.
Expert Tip
Use Amazon's category browser to identify browse node numbers. Navigate to your target category and check the URL - the number after 'node=' is your browse node identifier.
Publishing Format and Distribution Terms
POD (Print-on-Demand) means Amazon prints books only when ordered. This eliminates inventory costs but adds $2-4 per unit in printing fees compared to traditional offset printing.
KDP Select is Amazon's exclusivity program offering 70% royalties, promotional tools, and KENP payments. Books must remain exclusive to Amazon for 90-day enrollment periods.
Wide Distribution means publishing across multiple platforms (KDP, IngramSpark, Draft2Digital). This increases reach but sacrifices KDP Select benefits and typically reduces Amazon visibility.
Trim Size refers to your book's physical dimensions. Standard sizes (6x9, 5x8) cost less to print and ship, while custom sizes incur additional fees and may limit distribution options.
Expert Tip
Test KDP Select for 90 days with new releases. If KENP earnings exceed wide distribution sales, maintain exclusivity. If not, go wide after the initial enrollment period.
Marketing and Advertising Terminology
ACOS (Advertising Cost of Sales) measures ad spend efficiency. Calculate ACOS by dividing ad spend by attributed sales revenue. Target ACOS below 30% for profitable campaigns.
CTR (Click-Through Rate) shows ad effectiveness. Sponsored Product ads typically achieve 0.3-0.8% CTR, while Sponsored Brand ads average 0.2-0.5% CTR across most book categories.
CPC (Cost Per Click) varies by keyword competition. Broad match keywords average $0.15-$0.45 per click, while exact match competitive terms can exceed $1.00 per click.
Conversion Rate measures clicks that become sales. Book ads typically convert at 8-15%, significantly higher than most Amazon product categories due to lower price points.
Expert Tip
Start with automatic targeting campaigns at $0.25 default bid. After 2 weeks, extract high-performing keywords for manual exact match campaigns at 20% higher bids.
Revenue and Analytics Terms
Net Royalty is your actual earnings after Amazon's fees. For Kindle books, this equals list price × royalty rate minus delivery costs (typically $0.01-$0.15 per book).
KDP Reports update every 72 hours with sales data. Prior Month's Royalties report shows final earnings, while Month-to-Date tracks current period performance.
Page Reads apply only to KDP Select enrolled books. Readers must read past 10% of your book's content for page reads to register in your dashboard.
Return Rate shows books returned within 7 days of purchase. Rates above 5% may indicate quality issues or misleading book descriptions requiring immediate attention.
Expert Tip
Download your KDP reports monthly and track trends in Excel or Google Sheets. Look for seasonal patterns in your genres to optimize future publishing schedules.
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Frequently Asked Questions
What's the difference between BSR and sales rank?▾
BSR (Best Sellers Rank) and sales rank are the same metric - Amazon's ranking system within categories. Lower numbers indicate better sales performance, with #1 being the top seller.
How often does Amazon update KDP royalty reports?▾
KDP updates sales data every 72 hours for most markets. Prior Month's Royalties reports become final around the 15th of each month, showing your actual payable earnings.
What does KENP stand for in KDP Select?▾
KENP means Kindle Edition Normalized Pages - Amazon's system for measuring page reads in KDP Select books. Authors earn approximately $0.0045 per KENP read from the monthly Global Fund.
Can I change my book's browse nodes after publishing?▾
You can modify your 2 selected categories through KDP's book details page. Amazon may also assign additional browse nodes automatically based on your keywords and content.
What's considered a good ACOS for book advertising?▾
Target ACOS below 30% for profitable campaigns. Calculate by dividing total ad spend by attributed sales revenue - this ensures advertising costs don't exceed your profit margins.
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