All of them

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Sources:

https://www.halopedia.org/Halo_novels

https://www.halopedia.org/Category:Comics

That’s a lot of books

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Sources:

https://www.yodasdatapad.com/booklist.html

https://starwars.fandom.com/wiki/List_of_books

That’s a LOT of books

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Sources:

https://www.yodasdatapad.com/booklist.html

https://starwars.fandom.com/wiki/List_of_books