[quote=natsumehack]
I watched the show and read the manga, but I am refusing to say too much about exactly how much detail I know, as seeing they did release a few side books with it, like the whole story threw the eyes of ryuk, and a prequel/side story with L.
[/quote]

I just try to ignore everything that happened in the series after L's death, including the backstory they tried to give him. My opinion of the series stays higher that way.