The owner of the "diary" submitted the correct password today. The little book contains mostly hand-written notes on the "Conceptual Art Ideas" undertaken so far (10). Whenever I post a new "Conceptual Art Idea" I'll email him the text and he has agreed to paste it in the diary.
There is no "time-frame" to this project: it may take a few months, or perhaps even years to complete. Check back to watch the progress.