Thread:Bentonfill/@comment-27586321-20140927235836/@comment-3974322-20140928014509

Generally tie-in material like those books you mentioned can be disregarded if they're not confirmed to be canon.

Like Scar's backstory comes from a book written by a guy who doesn't even work for Disney.

Some tie-in material is canon, like the various tie-in comics to the Batman: Arkham video games.