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Sources and references.
Every material claim in the ten course modules is grounded in current (April 2026) research. Reference list below. When a source becomes out of date we update the module text and mark the source line.
KDP categories — the 2023 change
- Amazon KDP rolls out major changes in book category selection — Jane FriedmanThe primary writeup of the mid-2023 category change.
- KDP no longer accepting category requests — Kindle Forum
- Amazon KDP — Categories help page (primary)
BookTok in 2025–2026
Self-publishing platforms
Book formatting tools
KDP Select vs wide / Kindle Unlimited
Reviews and ARCs
Amazon Ads — 2026 current
Meta / Facebook ads — 2026 shift to AI-broad
Email marketing for authors
BookBub and promo stacks
UK specifics — Waterstones, Gardners, indie bookshops
The AI-slush problem on Amazon
- Amazon is filled with AI knockoffs — Rolling Stone
- AI e-books flood Amazon — Good e-Reader
- AI-generated books and self-publishing — Jane Friedman
- Amazon KDP royalty changes June 2025 — DibblySource for the 60% → 50% paperback royalty cut below ~$9.99.
- Amazon's AI disclosure policy — Authors Guild
Amazon algorithm (A9) — ranking, external-traffic pattern, pre-order rules
- Amazon A9 vs. A10 — SalsifyNote: Amazon has never officially confirmed 'A10' — it's seller-community shorthand. A9 is the only officially-named Amazon search platform.
- External-traffic rank effect (indie community reporting) — Neil Caley / MediumSource for the observed 3× external-traffic rank pattern. Community observation, not Amazon-documented fact.
- Kindlepreneur — Amazon pre-order treatment / honeymoon effect
- Ideal Kindle pre-order length — Tim O'Hearn
- Why your book isn't selling — Kindlepreneur
Amazon Ads 2026 — benchmarks and tactics
- Amazon Ads benchmarks 2026 — TrellisSource for ACoS tiers and CPC trajectory.
- Best BookBub Ads 2025 — BookBub Insights
- Kindle Lockscreen Ads 2025 — StartupNews
Audiobook production
Who to trust — sharks, traps, fair rates
- Alliance of Independent Authors (ALLi) — Watchdog DeskThe most reliable single source for vetting self-pub services.
- SFWA Writer Beware — primary
- The Creative Penn (Joanna Penn)
- David Gaughran — free resources
UK-specific — LoveReading, partnerships
- LoveReading.co.uk — primary300,000+ newsletter subscribers (per LoveReading internal data, 2026); trusted UK editorial source. Course graduates are eligible for editorial consideration via the partnership behind this course (course operator holds 35% stake in LoveReading.co.uk — full disclosure).
- publishing.co.uk — KDP formatter (course-partner)Course students receive a discount with code SELLMORE.
Last updated: April 2026. Review cadence: quarterly.