Xteink X4

A reasonably priced tiny e-reader. I've had a Kindle and a Boox but the size of this thing has kept me reading more consistently than ever before. I personally do not like bringing books on public transit (for bulk and for optics), and this is a great solution to reduce reading friction for commutes.

If you use Calibre it's very easy to bring all your e-books in .epub format onto the Xteink.