If you have been trying to get your friend or family member to get rid of the person they are with and you are all out of options "Don't Let Him Practice On You" is a great tool to give as a read to that individual. It will open the eyes of the unbeliever.
If you are tired of hearing about de ja vu then "Spiritual Gifts and the Church" is a great way to delve into what God has planned for you.