Do you have $300 burning a hole in your pocket and really like the manga Fist of the North Star? The eOneBook by Progress Technologies may be the device for you. Featuring two E ink displays that fold out like a book, the device can only be used to read 18 volumes of Fist of the North Star.
https://www.notebookcheck.net/The-eOneBook-is-an-expensive-dual-E-ink-display-device-that-can-only-be-used-to-read-one-manga.277588.0.html