Kno Movie from Kno, Inc. on Vimeo.

Big players have tried and failed to bring out a “textbook replacement” e-reader. Kno won’t be shipping their entry until Christmas at the earliest, but it’s a serious candidate that’s worth a second look.

Kno’s form factor is essentially two slightly-oversized iPads on a giant 180-degree hinge. It has two 11″ stylus-compatible touchscreens, which you can keep separate for a textbook or multi-screen layout, unify for a single widescreen display, or fold back for a single tablet.