That aside, what it really presents to the reader is that Camus is first and foremost a writer. Whether it's creative writing, critical writing, reflective writing, etc., he was accomplished at all of them. His description of a sunset, quaint as it might sound, is so beautiful it's almost heartbreaking. Meanwhile, his political observations are keen, with a strong sense of urgency.
Equally fascinating is to observe his literary works taking shape: to see the mind of a writer putting a major opus together. To me, this is the major contribution of the book. I highly recommend this book to aspiring writers, diarists, or to anyone interested in the mid-20th century thought. That goes for Existentialists too.