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How to read Kindle books on your desktop with AI (.mobi and .azw3)

· 4 min read
The MindMax team
The MindMax team
Building MindMax

To read a Kindle book on your desktop with AI, you need a DRM-free .mobi or .azw3 file and a reader that converts it into a proper book with chapters. Open it in MindMax and it becomes an EPUB-style book the first time, with the original file left untouched; from there you can ask questions with quotes, or have an AI annotate it chapter by chapter.

The catch comes first, because it decides whether the rest applies to you: books bought from the Kindle store carry DRM, and they cannot be opened. That lock is not ours to remove, and this post does not explain how to remove it.

Which Kindle files will open​

  • Will open: DRM-free .mobi and .azw3 files — documents you converted yourself, books from publishers and authors who sell without DRM, public-domain collections, files a colleague generated.
  • Will not open: books downloaded from the Kindle store to the Kindle app or a device. They are encrypted to your account.
  • Opens, with limits: older .mobi files that never had a table of contents. The text reads fine; there is nothing to navigate by chapter, which is where most of the value comes from.

If you have the choice when buying, an EPUB without DRM is the most portable thing you can own.

Step by step​

  1. Put the file in a folder. Anywhere you already keep reading material. There is no library to import into.
  2. Open it. The first time, the Kindle file is converted into a proper EPUB behind the scenes. Your original .mobi or .azw3 stays exactly as it was.
  3. Check the chapters. The contents panel comes from the table of contents the book was published with, not from guessing which lines look like headings. If the chapters look right, everything else will work.
  4. Read normally. Reflowable text at your font size, highlights that stay anchored to the passage, and search inside the book that lands on the passage, not just the chapter heading.
  5. Ask about it. Select a passage and ask, or ask about the whole book. Answers quote the passage they rest on; click a quote and the book jumps there with the sentence highlighted.
  6. Or let it read with you. Pick a lens — guide, review, critique or study — and the AI works through the book a chapter at a time, leaving notes in the margin beside the passages they are about, and a closing write-up when you stop.
A reading pass leaves notes beside the passages, counts them per chapter, and skips the index and licence.

Why chapter structure matters so much​

Most books are longer than any model can hold at once, so something has to decide what gets read. A tool that cuts the book into fragments and searches them will answer from whichever pieces matched your wording — and miss the argument that runs across chapters.

A book with a real contents page can be navigated the way you would: look at the chapters, read the ones the question needs in full, and go back for another if the first did not settle it. That is why step 3 is worth ten seconds of your attention.

Where it goes wrong​

  • DRM. Covered above. If it is from the Kindle store, it will not open.
  • Badly built books. Broken chapter metadata, or a whole book in one giant file, leaves chapter navigation with nothing to work with.
  • Fiction. The reading lenses are built around argument and evidence. It will summarise a novel; it has nothing useful to say about whether the novel is any good.
  • A whole-book pass is a real job. Opening, reading and searching your books costs nothing; a pass over four hundred pages is AI work and is priced like it. Try one book before a shelf.

Everything the reader does is on the AI EPUB and Kindle reader; what each lens marks is on annotation lenses. Why the AI leaves fewer notes than you might expect is in the AI annotates your book sparsely, on purpose. Download MindMax and open a book you have been meaning to finish.