Read stories with sound effects and background music on Booktrack. You don’t have to create an account to read/listen. If you do create an account, you can then create your own Booktracks: upload your stories and pictures and add sound effects.
Here’s an intro video:
There are plenty of stories to read, including Sherlock Holmes, Romeo & Juliet, Snow White, biographies, texts about history, essays and much more. There are also books in languages other than English. I saw only one Japanese text so far, though.
Here’s how it works:
There’s also an app for iOS and Android. If you click the “Sign Up Later” you can read/listen without creating an account.
If you decide to create an account and make your own e-books with soundtracks, there’s a page of tutorials to help you.