[tomsem]

I am a long time Bookerly person. I did try Ember for a couple of months when I got a Scribe. I've tried custom fonts before but somehow they don't stick.

Finding something I like better seems quixotic to me, it takes a little time at least to try out even one, and that is assuming I can even sense some perceptible 'improvement'. Bookerly is good enough, it is hard to imagine something that I could regard as more than good enough, or how it would be better.

That said, having such uniformity probably isn't helpful for memory/comprehension. It is probably better to have some variation so that different books take on different character.

This is something that they try to do with print books, though I don't know if there's it amounts to any more than a book designer's opinion (and the regard publishers have for that opinion) about what 'works' for a given book.

But short of embedding there's no reading system I know if that lets you pin the font for a book to one of those available. (KOReader would have it if anything does, but if it's a feature I cannot find it.)