Hi Sophia , [ Lover of Wisdom ]
It depends somewhat on how you and your Dad get along .
Do you talk together about spiritual things - things behind the vail of physicality ?
If you do already , then you should prayerfully discuss your concerns with him , being sure he understands that it is out of godly concern that you care , about what he's feeding his mind .
If you don't talk together , other than causally , this might not be the best place to start !?
Also , if that's the case , is there someone else then , who does talk deeply with your Dad ,(who is after a godly sort ), that you can express your concerns to ?
I wouldn't try deleting it yourself . People have to be willing to accept change in their lives ; trying to force it on them , usually only makes them angry .
Pray and seek to live as godly a life as is possible ; for when the light of Christ shines brightly out from within us ; the things of darkness are thrown away .
And many that believed came, and confessed, and shewed their deeds.
Many of them also which used curious arts brought their books together, and burned them before all men: and they counted the price of them, and found it fifty thousand pieces of silver. <-----> Acts 19:18+19
Note how it says , they brought " their books ", no one brought someone else's books to the " book burning " !
May The Lord Be Pleased To Bless
Prays of peace and hope ,
wm