I haven't come across a "GAE for Dummies" book ... yet. So far I have figured out everything by reading the SDK documentation. I would suggest making sure tha

I haven't come across a "GAE for Dummies" book ... yet. So far I have figured out everything by reading the SDK documentation. I would suggest making sure that you understand how Web App Framework which in turn requires an understanding of CGI and WSGI. The choice is yours whether you write single function Python programs and decode the URL using the app.yaml file or writing "chunkier" programs and doing some of the URL decoding in your program. I prefer to the former because it is easy to change functionality. But of course, your data model may suggest different structuring.