I’ve had that app for ages. And I only use F-Droid…

I use Book Reader (it’s on F-Droid) for my phone, which works well enough… don’t know how it performs on a tablet or if it has the features you’re looking for.

I would wholeheartedly recommend a dedicated e-reader with E-Ink display for more ‘serious’ reading (I have a Tolino for the evenings/bed. Depending on where you are located you could also look into PocketBooks or Kobos… just make sure they’re not chaining you to a closed ecosystem like Kindles).

Oh, sorry to hear that. DS9 gets pretty good later on - especially the “middle” is great, testing out the limits of the world/starfleet ethics. I think it’s my favorite trek… (second being TNG, watched that growing up). Maybe give DS9 another chance and just jump in somewhere after Season 1…