I use Koreader. It’s a bit heavy because it has basically any option you can think of, it works on a wide multitude of platforms, and can have weird bugs sometimes but hardly ever. But the way I read, I need some settings that aren’t in very many readers and it has them. Try it out.
What do you expect? Communists always block their people from seeing opposing viewpoints, because their ideas don’t hold water. They’re like a cult.