Open Source eReader, Open Book Touch, Launches Crowdfunding Campaign

According to a report by Brad Linder from Liliputing, a crowdfunding campaign for the open-source eReader “Open Book Touch” has begun on Crowd Supply. The device is priced starting at $149, with shipments expected in early 2027. Developer Joey Castillo has been working on this device for over six years.

The Significance of an Open Source eReader

The standout feature of the Open Book Touch is its fully open-source nature. The device operates on open-source software, allowing anyone to inspect and modify its firmware. Furthermore, the hardware design is also planned for release after the product ships, enabling users to print their own cases using a 3D printer or make various customizations.

This approach is positioned as a clear alternative to proprietary eReaders like Amazon’s Kindle and Rakuten’s Kobo. The key differentiator is that users have complete control over the device.

Features and Specifications

The Open Book Touch boasts a 4.26-inch E Ink touchscreen with a resolution of 480x800 pixels at 220 pixels per inch (ppi). It comes equipped with a front light that includes five warm white LEDs and five cool white LEDs, allowing users to adjust both brightness and color temperature. Compared to standard Kindle devices, the screen is smaller and slightly less sharp.

Storage is expandable via a microSD card slot, and the device supports EPUB and TXT file formats. However, it does not support DRM (Digital Rights Management), meaning that accessing content purchased from many popular eBook stores often requires legally ambiguous DRM removal. This limitation also affects the device’s compatibility with borrowing eBooks from public libraries.

The battery is an 800mAh lithium-polymer unit that users can replace themselves, a rarity among eReaders. Battery life is estimated at up to one week of continuous use. However, in terms of battery endurance, the device falls short compared to competitors, many of which offer weeks or even months of use on a single charge.

The dimensions of the device are 78x120x10mm, and it weighs 85 grams. Its snap-fit 3D-printed case can be disassembled without tools, making it easy to replace damaged cases or swap out the battery.

Content Transfer and Firmware

There are two ways to transfer eBooks to the device. Users can either copy files directly onto a microSD card or transfer them via a local WiFi network. The latter method is achieved by accessing http://libros.local from a device connected to the same network. No account registration or cloud service is required, as everything stays within the local network.

The pre-installed firmware, named “Libros,” is built on a new open-source application framework called “Focus.” It features a high-quality typesetting engine that supports line spacing adjustments and proper hyphenation.

Balancing Pros and Cons

While the Open Book Touch provides a level of freedom that traditional eReaders lack, it also comes with practical limitations.

On the plus side, the device offers complete user control over its firmware and hardware, a replaceable battery, local file transfer without requiring an account, and a lightweight, portable design.

However, its downsides include a smaller screen size, lower resolution, shorter battery life, and lack of DRM support, which limits access to content. Particularly for Japanese users, the lack of DRM support could pose a significant challenge in accessing eBooks from public library lending services like OverDrive or Rakuten OverDrive.

Editorial Opinion

In the short term, the crowdfunding campaign for the Open Book Touch is likely to garner support from users dissatisfied with proprietary ecosystems and those who value a strong DIY ethos. While the $149 price tag may seem steep compared to Kindles with similar screen sizes, the open-source nature and modular design of the device will appeal to a niche audience. However, for widespread consumer adoption, practical issues like DRM support and improved battery life must be addressed.

From a long-term perspective, this project is significant in reintroducing the concept of “user ownership of hardware.” In an era where smartphones and tablets are becoming increasingly difficult to repair, features like a replaceable battery and 3D printable cases align with the trends of a circular economy and DIY repairs. Additionally, the open-source firmware could encourage security researchers and modification communities to expand its functionalities, potentially creating an ecosystem distinct from Kindle and Kobo. That said, Amazon still dominates the eBook market, and factors like compatibility and ease of content access will be critical for broader adoption.

References

• “Crowdfunding begins for Open Book Touch, an open source eReader”, by Brad Linder — Liliputing, 2026-07-09T16:32:34.000Z (ARR)
• Source URL: https://liliputing.com/crowdfunding-begins-for-open-book-touch-an-open-source-ereader/