An author's marketing problem is that the product is text and the channels are visual. Generation helps with that mismatch genuinely: cover testing, atmospheric trailers, quote cards and social graphics all cost cents rather than commissions.
The line is anything that fabricates endorsement or reception.
TL;DR
- Never generate a review, a blurb, or a bestseller claim. Fabricated endorsement is a regulatory matter
- Cover testing is the highest-return use. Twenty candidates at 6 credits, judged at 100 pixels
- Book trailers work because they are atmospheric, not narrative
- Film yourself for anything about you or the book's ideas
- A full launch campaign: roughly 700 credits, about $7
Cover testing, which matters most
A cover is judged at about 100 pixels tall, in a grid, next to its competitors. Generation makes it cheap to find one that survives that.
- Collect twenty covers from the top of your exact subcategory. Not books you like, books ranking where you want to rank.
- Generate art only. No title, no author name in the prompt. Leave a third of the frame visually quiet for type. Seedream 5 at 6 credits.
- Twenty candidates: 120 credits, about $1.20.
- Set the type in your editor with a real font. Generated text garbles, and a misspelled title is a dead listing.
- Test at 100 pixels in a mock grid with the competitor covers.
- Upscale the winner for print, Topaz Image Upscale at 11 credits per 24-megapixel block, to your printer's spec.
More detail in best AI image generator for book covers.
Book trailers
The thing to know: book trailers work when they are atmospheric and fail when they try to tell the story. You have sixty seconds and a novel; summarising is hopeless. Conveying a feeling is achievable.
Which suits generated video well, because atmosphere is what it does best: weather, light, texture, landscape, objects, mood. No characters, no faces, no dialogue, no plot.
Canon 8frame prices, a credit is $0.01 at pack rate:
| Element | Route | Credits |
|---|---|---|
| Atmospheric shot, 5s at 480p | Wan 3.0 | 24 |
| Shot at 1080p | Wan 3.0 base, 5s | 95 |
| Shot with generated audio, 8s | Veo 3.1 Lite | 54 |
| Long establishing plate, 30s at 480p | Wan 3.0 base | 142 |
| Music bed, 30s | Lyria 2 | 13 |
| Sound effects | ElevenLabs SFX at 5 | 5 |
| Narration of one line | ElevenLabs TTS at 13 per 1k | ~5 |
| Assembly | Merge Videos | 10 |
A 60-second trailer: fifteen shots at 480p (360), music (13), six effects (30), assembly (10) is 413 credits, about $4.13.
Build the sound first, then cut pictures to the hits. A trailer is a sound design piece and the visuals are timed to it.
The line
Never generate a review or a blurb. Not a quote from a publication, not an endorsement from an author, not a star rating. Fabricated endorsement is a regulatory matter in most markets and, in publishing specifically, a reputational one that ends careers.
Never imply bestseller status you do not have.
Never generate a photograph of a real author, including yourself in a way that misrepresents you.
Quote cards from your own book are fine, because the words are yours.
What to film
You, talking about one idea from the book. Ninety seconds, phone camera, a window. This is the content that sells books by an author nobody has heard of, because the reader is deciding whether they want to spend nine hours with your mind.
A reading. One page, read well.
Do not use a synthetic presenter. The voice is the product.
What a launch costs
| Item | Route | Credits |
|---|---|---|
| 20 cover candidates | Seedream 5 at 6 | 120 |
| Cover upscale for print | Topaz Image Upscale | 11+ |
| 60-second trailer | as above | 413 |
| 20 quote cards with exact text | Nano Banana Pro at 21 | 420 |
| Total | ~964 credits, about $9.64 |
Or use Seedream 5 at 6 credits for quote cards and set the type in your editor, which drops the total to about $6.64 and gives you exact typography.
FAQ
Can I generate a book trailer? Atmospheric ones, yes. Narrative ones do not work regardless of tooling.
Can I generate review quotes? No. Fabricated endorsement is a regulatory and reputational problem.
How much does cover testing cost? 120 credits for twenty candidates, about $1.20.
Should I be on camera? Yes. Readers are deciding whether they want your mind for nine hours.
Test twenty covers, build the sound, film yourself. The 8frame canvas is free and unlimited, and generation is paid from $19/month.