When it comes to an eBook reader, the choices are limited. The market is dominated by Amazon’s proprietary Kindle along with a few other options like Kobo, Nook and Onyx.
An interesting news for open source enthusiasts is that a developer, Joey Castillo, is working on creating an open
Kobo ereaders are very freedom respecting. You can run koreader or plato on it very easily if you are a little bit tech savvy. Just involves plugging in the reader to a computer and running a shell or powershell script.