The first is an "AWR Formatter" written by a friend of mine, Tyler Muth. It's pretty cool - works as a Chrome plugin - and it makes an AWR report a little more 'friendly' to use. It creates hot links for many of the wait events (so you know what they mean) and it summarizes up a lot of stuff - making the AWR report a lot more "interactive". Check it out and give him feedback on it if you have time.
The second is a book recommendation. If you've been looking for an excuse to learn APEX (application express) and wanted a book to work through it - here is one for you
. I know most of the authors personally and can attest for their technical knowledge of APEX. I also really appreciate what they are doing with the royalties. See that link for what they've done. I knew both of the people they reference there.