Packt Publishing has published a new ADF book written by Nick Haralabidis, Oracle JDeveloper 11gR2.
I've run a quick scan and the book contains some very nice tips and tricks on advanced ADF tasks. This book is not aimed at ADF beginners though.
The book contains over 85 simple, yet effective recipes for using Oracle JDeveloper 11gR2 to build ADF applications. It is well structured, guiding the developer from project setup, to entity objects, view object techniques, LOVs and view criteria, AMs, task flows, backing beans, security, deployment, debugging and fine tuning and monitoring.
In conclusion, i would highly recommend this book to any ADF developer.