To format a thriller for KDP, use a 5.25”×8” or 5.5”×8.5” trim on cream paper, 11pt Garamond or Baskerville, tight line spacing (1.3×), and short chapters starting on new pages. Thrillers are Amazon’s second-highest selling fiction category after romance — readers buy in volume and consume fast. A typical 85,000-word thriller runs ~330 pages at 5.25×8 or ~300 pages at 5.5×8.5, costing about $5.20–$5.52 to print on KDP.
Trim size
| Subgenre | Recommended Trim | Why |
|---|---|---|
| Domestic thriller | 5.25” × 8” | Compact, quick read feel |
| Legal thriller | 5.5” × 8.5” | Slightly more substantial |
| Spy / espionage | 5.25” × 8” or 5.5” × 8.5” | Either works |
| Military thriller | 5.5” × 8.5” | Often longer manuscripts |
| Psychological thriller | 5.25” × 8” | Intimate, claustrophobic |
| Techno-thriller | 5.5” × 8.5” | Longer, more technical content |
The 5.25×8 trim is increasingly popular for thrillers — it’s between mass-market and trade paperback, giving a compact feel that matches the pace of the genre. Use the KDP Book Calculator to compare page counts.
Short chapters and pacing
Thrillers use formatting as a pacing tool. Short chapters (3–8 pages) create the “one more chapter” effect:
- Each chapter starts on a new page — recto (right-hand) for premium feel, or next page to save pages
- Chapter numbers only — “Chapter 12” or just “12”, not titled chapters (titles slow the reader down)
- Minimal chapter opening whitespace — drop down 1/3 of the page, not 1/2 (faster visual rhythm)
- Short chapters = more whitespace — a 35-chapter thriller has ~35 partially blank pages. An 85K-word book that should be ~300 pages may run 315–320 with all the chapter breaks.
Dual POV / alternating timelines
Many thrillers alternate between perspectives or timelines:
- POV name or timeline as chapter subtitle — “SARAH” or “THREE YEARS AGO” below the chapter number
- Font variation — some thrillers use different fonts for different timelines (use sparingly)
- Consistent pattern — if chapters alternate, maintain the rhythm
Scene breaks
Thrillers use scene breaks for jump cuts — abrupt shifts that increase tension:
- Three centered asterisks ( * * * ) or a thin horizontal rule
- Minimal extra space — just enough to signal the break, not enough to slow the reader
- End scenes mid-action — the scene break itself becomes a micro-cliffhanger
Cambric handles short chapter formatting, clean scene breaks, and tight spacing that matches thriller pacing. Export a KDP-ready PDF in minutes.
Get Cambric — $199
Series formatting
Thriller series sell on momentum. Back matter is critical:
- Preview of next book — include the first 1–2 chapters. This is the #1 series sell-through tactic.
- Also By page — list all books in series order, in front matter
- Series branding — consistent spine design, consistent trim size
- Back matter order: Epilogue → Author’s Note → Preview → Also By → About the Author
KDP PDF settings
- Page size: 5.25” × 8” or 5.5” × 8.5”
- Fonts: all embedded
- Color: black and white interior
- Paper: cream
- Bleed: no bleed (text-only)
- Page count: must be even
Pricing
| Word Count | Pages (5.25×8) | Print Cost | Price | Royalty |
|---|---|---|---|---|
| 70,000 | ~290 | ~$4.84 | $14.99 | $2.16 |
| 85,000 | ~330 | ~$5.32 | $15.99 | $2.28 |
| 100,000 | ~390 | ~$6.04 | $16.99 | $2.16 |
Thriller paperbacks price $14.99–$16.99 on KDP. Readers buy on impulse and expect mass-market pricing. Don’t price above $17.99 for a debut.
Related guides
- Format a thriller — genre conventions
- Thriller on IngramSpark — bookstore distribution
- 5.25×8 KDP specs — trim specifications
- Scene breaks guide — break styles
- KDP Book Calculator — page count and cost