One question we always get is - where can I get books about Oracle ADF.
Although we still don't have these in stores (except for the JDeveloper handbook that has a big section about it).
We do have some ADF specific books online created by our documentation team.
The one that was there for a while was the ADF development guidelines - http://www.oracle.com/technology/documentation/jdev/adf_guidelines_manual.pdf
the new one is the ADF Case Manual which just came out.
Check it out here: