Compare
BookArc vs Gemini for writing a book
Of everything on this page, Gemini is the one that can do the most different jobs: research a subject properly, draft it, make a picture for it, and drop the result into a Google Doc. The gap is not capability. It is that a book is a structure and a shop wants a particular file.
Feature comparison
| Feature | BookArc | Gemini |
|---|---|---|
| What it is | One tool for one job: a whole book, from a sentence. | A general assistant, wired into Google’s own products — with Canvas for drafting, Gems for custom assistants and Deep Research for gathering sources. |
| Writing a chapter | Yes. | Yes, and it is very good at it. |
| Researching the subject first | No. It writes from what the model knows and from the brief you give it. | Deep Research is built for exactly this, and it is the strongest thing on this table. |
| Planning the whole book first | Plans the full chapter list before writing, in a shape chosen for the format, and lets you retitle, reorder or cut before a word is generated. | Will draft an outline on request. Keeping it, revising it and working through it chapter by chapter is yours. |
| Continuity across chapters | Each finished chapter is summarised and handed to the next, with what must be carried defined per format. | Bounded by the conversation. Canvas keeps the draft beside you, which helps; remembering what chapter three claimed is still your job. |
| Files at the end | Print-ready 6 × 9 PDF with fonts embedded, EPUB, Word, and the cover as a PNG. | Canvas exports into Google Docs, slides into Google Slides or a PDF, and code into Colab. From a document to a shop’s files is your own work. |
| Cover art | Designed for the book and sized for the trim, with the title and byline asked for as part of the artwork. | Generates images, which most assistants do not. Sizing one to a trim and checking the lettering is yours. |
| Effort for a ten-chapter book | One sentence, approve the plan, read what comes back. | Many prompts, plus assembling, formatting and packaging what comes out. |
| Pricing shape | Free tier, then a monthly plan. Credits per book. | Free tier, then monthly subscription tiers. |
Gemini details checked against their own site on . Products change — check theirs before deciding, and tell us if anything here is out of date.
Choose BookArc if…
- You want the four files at the end, not a document to convert.
- The book is long enough that chapter twelve has to remember chapter three.
- You would rather approve a chapter plan than maintain one.
- You want one predictable price per book rather than an afternoon of your own time.
Choose Gemini if…
- The book needs real research before it needs prose.
- You want to write it yourself, with help.
- You live in Google Docs and want the draft to land there.
- You want one assistant for everything, not a tool per job.
Gemini is not the weak option on this page
It writes well, it makes pictures, and Deep Research will go and read the web properly before it says anything — which is more than BookArc does. If your book needs facts gathered before it needs sentences written, start there rather than here. We would.
- Research. Deep Research is genuinely good, and BookArc has nothing like it.
- Images in the same place as the words, which most chat assistants cannot do at all.
- Living inside Docs and Drive, so a draft lands where the rest of your work already is.
- Being one subscription that also does your email, your spreadsheets and your holiday planning.
What a book needs that a conversation does not give it
A book has to agree with itself for 30,000 words. Around chapter eight, a chat-written one usually stops doing that: a figure from chapter two comes back changed, a term gets introduced twice, a character acquires a second pair of eyes. It is not a weakness of the model — it is what happens when the early chapters are behind you rather than in front of you.
BookArc handles it mechanically rather than by remembering. Every finished chapter is summarised into a continuity record passed to the next, and each format decides what must be carried: a novel carries plot and character, a research report carries every figure and definition it has already stated.
Export to Docs is not export to a bookshop
Canvas will put your draft into a Google Doc in one click, and that is genuinely useful. It is also where the publishing work starts rather than ends.
A shop selling your ebook wants an EPUB: reflowable, with a cover image and metadata inside it. A print-on-demand service wants an interior at a fixed trim size — 6 × 9, usually — with a wider margin on the bound edge, fonts embedded, and no cover bound into page one, because print-on-demand services reject interiors that include one. Those are layout decisions, and a word processor does not make them for you.
The cover, where both of us should be checked
Gemini can draw a cover, which is a real advantage over assistants that cannot. What no image model reliably does yet is spell — and a cover is a picture with your title written on it.
BookArc plans the book, writes it, draws the cover and hands you the EPUB, the print-ready PDF and the Word file. Thirty credits free, no card.
Write a book freeUsing both, which is the sensible answer
Research the subject in Gemini, where the research is better. Bring what you learn into a BookArc brief, let it plan and write the book, then take the Word file back out if you want to work on the prose somewhere else. Nobody is asking you to pick a side.
When to skip BookArc entirely
If the writing is the part you enjoy, if the work is a report rather than a book, or if what you need is facts rather than chapters — use Gemini. BookArc earns its place at the point where you want a finished object and the files a shop will take, without spending a day learning what a gutter margin is.
Questions people ask
Is BookArc just Gemini underneath?
BookArc runs frontier models through its own provider layer, and which vendor is configured can change without the product changing. It is worth being plain about what that means: the sentences in any tool in this category come from a frontier model, so the prose is not the difference. The planning, the continuity handling and the export pipeline are.
Can Gemini produce an EPUB or a print-ready PDF?
Its Canvas exports into Google Docs, its slides into Google Slides or a PDF, and code into Colab — that is what its own help centre lists. A store-ready EPUB and a print interior laid out at a trim size are work you do after that, in another tool.
Can Gemini design my book cover?
It generates images, which is more than most assistants offer. What it does not do is size the artwork to your book’s trim or guarantee the lettering is spelled correctly — check that yourself, on any cover from any tool.
Can I edit what BookArc writes?
Yes. The chapter plan is editable before anything is written, chapters can be regenerated one at a time, and the finished book exports to Word if you would rather work on the text elsewhere.
Other comparisons
Write the book you keep meaning to write.
Describe it in one sentence. BookArc plans the chapters, writes every one of them and designs the cover. 30 credits free, no card.