The Necronomicon pictured in Jason Goes to Hell: The Final Friday
When Steven is in Jason's house he flips through the Necronomicon / Book of the Dead from the Evil Dead movies.
'Director Marcus says the truth is that Jason is a Deadite from Evil Dead, summoned by Pamela Voorhees:
"She makes a deal with the devil by reading from the Necronomicon to bring back her son. This is why Jason isn’t Jason. He’s Jason plus The Evil Dead, and now I can believe that he can go from a little boy that lives in a lake, to a full grown man in a couple of months, to Zombie Jason, to never being able to kill this guy. That, to me, is way more interesting as a mashup, and Raimi loved it!”
Source https://www.slashfilm.com/friday-the-13th-evil-dead/
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