开始使用webOS / Mojo SDK开发的推荐阅读材料？

I am starting to delve into the world of webOS and the Mojo SDK and having a great time so far, but I find myself having to constantly take a detour and read up on different subjects such as JSON, JavaScript, etc. I realize now that instead of diving in head first I probably should have done some reading on the core technologies behind webOS, and so I turn to the stackoverflow community for some advice.I am starting to delve into the world of webOS