CathInfo.com

Sorry for that terrible copy and paste on my phone.

Yes, but how do these doors get open?  They don't just open on their own.

A weak willed person just by a whispering in the imagination can open doors, because the demons know exactly who we are.  I do not think that inanimate objects, like words on a page, can open doors.

  The book was the cause of the curse.  The book opened the door.  Accidentally used by the person, the book is the cause.

I think that this is what the demons want us to believe.  They want us to believe that you can accidentally give them access, because once you are afraid the demons have more power.

God does NOT allow (except in rare circuмstances) people to be attacked by demons, who stay away from these doors. 

But don't we all open up doors every time we sin and give offense to God.  You could remove all books, all music, all videos and still have issues with demons, because our sin opens us up to demonic attacks.

And she BECAME susceptible due to this book.  She was not susceptible "just because".  That's not how it works.

My guess is either she had certain sins in the household that were not being addressed or someone else had a sin that was not being addressed and she was the easiest one for the demon to get to.