Yeah, definitely one of the more hackable “just a reader” type devices. They tend to have most of the features you expect from higher end devices, just on a more stripped down platform.

Really good bang for your buck, and being able to just throw any format at it and have it work is nice.

I’ve had good luck with Pocketbook. They all run on a busy box kennel and can be pretty easily flashed. Since it’s just running Linux, you can also just load in alternative interfaces as apps that just run on the existing kernel