I might be late to the party but I discovered something new today! EPIC for Educators is both an app and a website for teachers and students. It is full of books with a huge range of genres and topics. Some of the book can be read to you or you can read it for yourself.
My students already have so many accounts, usernames and passwords to remember for different things but this might be worth adding to the list.
I am especially excited about the range of nonfiction topics. I have a nice amount of nonfiction books but you can never have enough. Especially when a student comes to you with an interest that you don't have built up in your library yet! I think this will fill the holes that I currently have as far as book choices. I haven't played with it a lot yet and I'm not sure you can bookmark books when you stop reading but I'm hoping it is as user friendly as it looks!
I know there are many sites out there like Bookflix and Storyline Online, which will read books to you (EPIC has mostly "read on your own" titles). However, this seems to have more title options and some are even chapter books. With my students really diving into researching topics and finding evidence to support opinions, I could see this coming in handy for kids with unique interests.