Silent Sustained Reading

I'm not the kind of person that likes to read books. I only read books when I'm forced too and even then, I'm still not into the reading. Science fiction is usually my favorite type of book to read, but the introduction is a very slow process in the books I've read, so it tends to be boring. I tend to slowly knock-out or gaze off somewhere rather than read my book sometimes. I don't get how people read for fun, the book could be better because of the details and description of the story, but that's a con for me because long stories tend to get boring and too descriptive for me to read. How do people read for hours on a book for fun sometimes? I mean it's probably a really good book, but I would probably spend months just trying to complete half a book sometimes. I see people reading their books everyday and are really into it, but when you see me, I just read only 5 pages and not get into it. I've read many different genres and I still can't find the best genre that suits me. Hopefully, I get that feeling one day in a book that won't make me stop reading it or won't let me put the book down, but not because I'm forced to read... but to read for fun.