The novelist publishing on KDP
She paid an illustrator for the front and has no budget left for the back. She uploads the cover, pastes her hook, and drops the matching back into the KDP paperback cover template.
Design your book's back cover with AI
Two back covers made from your front cover, one in the same scene and one stripped back, with your blurb written letter for letter. Workflow visible here, no account needed.
Real workflow: the cover of the made-up novel "North of Silence", then two back covers, one over the stormy sea and rocks, one on plain navy with the lighthouse lantern in a round inset, cream blurb and gold author name.
At a glance
- You provide
- 1 photo · a text or a brief
- What the workflow produces
- 2 images in 3:4
- Canvas structure
- 6 nodes wired by 4 connections
- Models wired in
- Nano Banana 2.1
- Cost of one full run
- about 14 credits, roughly $0.17
- Account
- The demo is visible without an account; generating requires a free account, trial credits included
Self-published authors often spend weeks on the front cover and do the back the night before uploading to KDP: a flat colour, the blurb in a default font, and a book whose back no longer looks like its front. This workflow starts from YOUR cover and gives you two back covers, one that carries on the artwork and one that's more restrained, with your blurb on both.
The hard part is continuity and text. The back has to pick up the colours and type of the front, and the blurb has to come out clean, accents and apostrophes included. The prompt quotes every sentence and keeps the barcode corner empty. Nano Banana 2.1 reads the cover you give it and spells accurately.
The front itself is made with the book cover tool, and a photo of the finished book with the book mockup. Both back covers cost fourteen credits.
Actual renders from the demo
These are the files of the workflow above, exactly as the models produced them, unretouched. The starting point is shown when there is one.
Starting point
Render
Who it is for
Novelists and self-published authors on KDP or print on demand, small presses, authors preparing a crowdfunding campaign.
Which files to provide
The final front cover, two or three hook sentences in quotes, an optional quote and the author name.
How it works
- 1
Upload the cover
The final front cover file, title included. That's where the back gets its palette, light and type.
- 2
Write a short blurb
Two or three hook sentences, each in quotes. A ten-line block of copy comes out harder to read and is better set in your layout software.
- 3
Add a quote
A line from a reader, a fellow author or the book itself, in italics. Never quote a review or a paper that doesn't exist.
- 4
Build the full wrap
Upscale the render with the Enhance node, then place it in the KDP cover template or your printer's, with the spine and bleed.
Variations and use cases
The same canvas, tuned for different needs: each variation is two or three lines of prompt away.
The crime series author
Every book in the series shares one look. The plain version, solid background and a small inset from the front, carries from one title to the next by changing only the blurb and the quote.
The small press
The publisher shows the editorial team two possible backs for the next title before briefing the designer. The discussion is about a picture of the book, not a description of one.
The short story collection
The author wants a line from each story. The plain version leaves room for three short italic lines under the hook, as long as every one of them is given in quotes.
The crowdfunding campaign
To pitch the book to backers, the author shows front and back side by side. Visitors see a finished object with a readable blurb before a single copy is printed.
The writing workshop
At the end of the course, each writer drafts the hook for their project. The tutor generates a back cover on the front each person made, and the group judges whether it makes them want to open the book.
Common mistakes
A blurb that's too long
Ten lines of synopsis on the image and the model shrinks the type or slips a letter. Keep the hook on the image and set a longer blurb as live text in your layout software.
Making up reviews
"A masterpiece", credited to a paper that never read the book, is misleading and readers notice. Quote a real line: yours, or a reader's who gave you permission.
Covering the barcode area
Text or a rock in the bottom right corner and the barcode lands on top of it. Keep the white rectangle in the prompt, and erase fake bars if the model draws them.
Uploading the render as is
The render is 3:4 at screen resolution. A printer wants your trim size at 300 dpi, with spine and bleed. Upscale, crop, then assemble.
Recommended models
Nano Banana 2.1
Flux Kontext
GPT Image 2.5 SunburstFrequently asked questions
Is the blurb spelled right?
In the demo, yes: both sentences and the author name are exact on both versions, apostrophes and accents included. Still read yours word by word.
Do I get a barcode?
No. The render keeps a white rectangle; on the matching version it has meaningless bars drawn in it, to erase. The real barcode comes from your ISBN, and KDP can place it for you.
Does it work for non-fiction?
Yes: essays, how-to books, poetry. Change the quoted text, and for a how-to book, ask for a short list of what the reader will learn.
How much do the two back covers cost?
Fourteen credits, seven per render on Nano Banana 2.1. A third version, with another blurb or quote, costs seven more.
Why Nano Banana 2.1?
Because it reads the cover you supply and keeps its palette, light and feel of the type, and it spells accurately. In the demo there isn't a single mistake in the blurb on either version.
Is the render KDP-sized?
No. It comes out at 3:4, 896 x 1200 pixels, while a 6 x 9 inch book is narrower. Use it as a mockup: upscale it, crop it, then place it in the cover template KDP generates from your page count.
Can I add an author photo?
Not in this workflow, which starts from the cover alone. Add your portrait later in the layout, or make one first with the professional headshot tool.
Can I sell the book with this back cover?
Yes, for your own book. Check your platform's terms on generated images and read the rules on commercial use.
Design your book's back cover with AI
Use this workflowFree account, no card required. The workflow opens pre-filled in your canvas.