Hi, and welcome! If you browse the Book Talk forum you might see some books that interest you. There's a recent thread on our best reads from October, but plenty of other threads might include mentions of books that would suit you.
As for what's appropriate for you - well, we'll have to get to know you better to know what you mean by that! If you register some of your own books - even if you don't plan to part with them just yet - it might help give an idea of the kinds of things you like.