Many classics like Alice's Adventures in Wonderland and Anne of Green Gables (one of my favorites!). They also have audible books available in Japanese, French, Spanish, Italian, and German.
These are audible books. All of the books are public domain ones, so you'll probably find many classics. May I recommend Princess and the Goblin?
There are books to purchase, but if you go to their Public Domain page, there are many free books. Little Women.
Looks like they have e-books available in different languages, too.