We've done a host of reading recommendation threads ... not sure any of them have a specific level of difficulty attached to them. Though my advice would be to forget all that. If it's on a topic you're interested in, the hardest book in the world will seem like a breeze. https://hubski.com/pub?id=139171 https://hubski.com/pub?id=99162 Those are the only two off the top of my head. I saw a long conversation about this the other day on reddit. I find the internal voice helps me focus. I didn't realize that anyone didn't use it, except the deaf. Supposedly getting rid of it makes you read more quickly; I'm skeptical, but in any case I don't want to sacrifice any retention.As for speedreading, I guess I just want to rid myself of that internal voice as I read.