It sounds like you could use a solid understanding of the fundamentals of REST, and for that I highly recommend RESTful Web Services by Leonard Richardson and Sam Ruby. I provides a great introduction to REST: what it is and how to implement a (practical) RESTful web service.
Most of the example code in the book is actually Ruby, but it's easy enough to understand even if you're not a Ruby expert. But one thing that should help you specifically is that one of the later chapters of the book contains overviews of several RESTful frameworks, including Restlet. It doesn't really get into any code (it's a 50,000-foot flyover) but I think it'll give you just what you need at this stage.
