I can generally only have two books on the go if one is fiction and one is non-fiction. That said, I'm reading Green Dot by Madeleine Gray, a fun literary fiction book I've kind of stalled progress on, and so I started Why Can't I Just Enjoy Things by Pierre Novellie alongside it - a book by a stand-up comedian about getting diagnosed with an autistic spectrum disorder as an adult.

Reading both on a Bigme Read 6" - I don't love the limited Android-based stock rom it ships with (or the middling battery life), but I basically never leave KOReader so I don't have to deal with it much.