The HUAWEI MatePad Paper
https://www.youtube.com/watch?v=PI6jW9TW3Cw
There's more than just books though, as this seems like a fully-functioning productivity device with emails, calendars, certain apps available to download from the Huawei App Gallery, handwriting conversion (using the stylus), connectivity between the Paper and a smartphone or PC, voice recording, video playback and more... More here.
Almost. This does look good, but the limitations of e-ink remain. Give me an e-ink phone that does most things and I would be on board in a heartbeat.