Karim Zaouai has created an eBook reader concept that has dual screens that use eInk technology. The video below shows the device being used with the content of the pages being manipulated by controls on the device.
The video doesn't show a real product and instead, looks to superimpose images of an eBook reader on the device to give you an idea of what the concept is about.
If the product ever makes it to production, it is expected that it will have wireless capabilities to download books to the internal storage.
There looks to be no touchscreen implemented on this concept either. Take a look at the video below to see a demonstration of how the dual-screened device might work...