Now，it seems that working on OU cases is highly dependent upon the forensic science，and therefore cannot be regarded as real detective work，in other words，Bosch should retire fully，and not linger on，the watershed was Lost Light，
7：57 AM，
Bosch needs a 「reason」 to go on，for example，a picture of the dead，
In other words，all the Bosch series，are meant to describe that 「reason」，
raison d'être，字面義為 reason of being（存在的理由)， raison 是法文的 reason（理由)，être 是法文 be 動詞的原形，此處作「存在」解，
Now，Connelly quoted this one more than once，
「Beware that, when fighting monsters, you yourself do not become a monster ... for when you gaze long into the abyss. The abyss gazes also into you.」(Friedrich W. Nietzsche)
Now，in Desert Star (2022)，Bosch，like Scudder，still prefers working in the knocking-the-door (GOYAD) way，
使用高科技的資料庫之外，他仍然不停敲門，
這是正確的活在廿一世紀的方法，
Cf Scudder
https://tvtropes.org/pmwiki/pmwiki.php/Literature/MatthewScudder
Trope，
「something such as an idea, phrase, or image that is often used in a particular artist's work, in a particular type of art, etc.」
