My Kindle is hands-down the favorite piece of tech I own. I make it a point to read every night, and the Kindle facilitates that.

But unlike a tablet, it doesn't really offer me a way to dive deeper into what I'm reading. Whether it's difficult prose or summarizing the story so far, if I'm coming back to it after a while, I usually reach for my phone.

Recently, I hacked my Kindle to solve this problem. Using a combination of KOReader and an API key for Gemini, I now get more control and personalization in my reading experience.

I can highlight something, ask a question, get an explanation, and translate something on the same page without leaving the book. And the best part is that it does this without any of the distractions that come with using a tablet.

How Gemini works on a jailbroken Kindle

Using Gemini for contextual replies

The setup starts with jailbreaking a Kindle. That might sound like a daunting process, but in 2026, it is as simple as following a few simple steps.

Instead of repeating the steps here, go to the Kindle Modding website for the lowdown. You should have KOReader installed by the time you're done jailbreaking your Kindle.

Next, installing the AI assistant plugin is a simple matter of copying over the assistant file to the plugins directory on your Kindle. Go to Gemini's API page, generate a client and secret key, paste it in the plugin's settings, and you're done.

On to the fun stuff.

The AI Assistant plugin deeply integrates into KOReader, which means it has the full context of the book you're reading to unlock the full range of its capabilities.

Here's how it works. Anytime you select or highlight text in KOReader, a pop-up gives you the option to invoke the AI assistant. Tapping this button is what turns my Kindle into a fully context-aware AI assistant.

For example, if I've selected a paragraph where the prose is too complicated, I can tap the assistant button to ask for a simpler version.

The AI Assistant plugin sends the contents of the book so far to Gemini, which parses and sends back a simplified version. This tends to be more useful than a simple dictionary because it has context from the content of the book I'm reading.

I use this with nonfiction, where authors often introduce historical events or technical terms. I usually read these books to broaden my knowledge, but not as a research deep dive. Gemini on my Kindle helps me rediscover these key concepts and understand tough sections.

The feature set goes beyond that. For example, if I'm looking for definitions, unlike standard search, the AI assistant plugin gives me contextual definitions, keeping the context of the passage I'm reading.

Translation is another obvious use case. I've lately started picking up French novels to brush up on my high school language skills.

While I understand a lot of what I'm reading, some nuance can get lost. That's where the AI-powered translate feature comes in.

Compared to standard translation tools, this AI-powered feature can keep context instead of literal word-to-word conversions.

Useful when you want something more than simple explanations

Use custom prompts to dig deeper

With the basic functions out of the way, let's talk about some of the more interesting ways to use Gemini on the Kindle.

It's not too uncommon for me to come back to a book after a few weeks or months. Using Gemini on the Kindle, I can ask it to give me a summary of the book so far.

Not only that, the custom prompt setting lets me craft queries that help me justify the positioning of a character in a book or explain a technical concept as if I'm five. There's a lot of flexibility here.

The biggest advantage is that having Gemini on the Kindle removes the friction associated with context switching between the Kindle and my phone.

Would a phone be faster at the task? Possibly. But the potential for distractions and breaking my flow ensures that I stick to taking the slower but surer approach on my Kindle.

Another thing worth keeping in mind is that it is easy to use AI as a crutch for speed reading with summaries. As tempting as that is, it's not really reading anymore.

It makes sense to treat the onboard AI as a reference tool instead of a conventional AI-based chat tool.

Gemini makes my Kindle a better reading companion

Adding Gemini to a Kindle isn't transformative in isolation. You still have to read the book.

Instead, it offers an easier way to understand what you're reading and contextualize your reading better. If there's something you don't understand, AI can explain it to you.

I can get it to explain a paragraph, translate a foreign language, or even give me an X-ray vision of all the characters in a book that spans ten volumes.

For me, that's more than enough to make it an essential add-on to my jailbroken Kindle. More so because it's absolutely free.