There are a couple of features of the docs that are sometimes overlooked, so I thought I'd mention them.
If you click on a book in the documentation library, over on the left there are a couple of buttons. The feedback button lets you send us a message about the doc that you're looking at, so if something is confusing or incorrect, you can let us know and we'll fix it. There's also a download button where you can get a PDF of the current doc.
Also, if you're on the main page for Oracle Docs, there's a flying question mark box that you can click to give feedback about the doc site in general:
Speaking for our team, we do actually read those feedback messages, so let us know what you think.