One of the biggest manipulations of the Jinn is through visions. Through these visions the Jinns are more likely to lead people away from the worship of Allah then any other way. When a person sees a vision in front of his eyes it is something which is very hard to explain away. Only by having knowledge of the world of the Jinn and conviction in Allah, can a person fight such a trial. The countless numbers of visions of Jesus Christ and the Virgin Mary over the centuries has been a popular choice for the devils. It almost seems as if leading Christians astray is the most easiest trick for the Jinns! Not only are Christians fooled by these visions, but often the Jinns possess and begin to talk from their voices. To the Christians this is known as the tongues of the Angels and thus a proof for their faith. However, the amount of unintelligible nonsense and rubbish which is heard is a clear proof that this is in fact the tongues of the devils! For other people, visions of their parents or relatives are commonplace. By taking on the form of peoples parents, the Jinns can convince people that the souls of dead people still mix with the people of the earth. This is why so many people believe in ghosts.
The onslaught of satanic visions has also hit the Muslims. Many Muslims claim to have seen visions of the Prophet Muhammad (Peace be upon him) and even Allah! By doing this, Shaytan is able to lead astray the weak Muslims. Through such visions, Muslims are often told that the commands of Islam are not applicable to them. The Jinns tell them that Prayer, Fasting, Hajj etc. are not obligatory for them. It is a great deception and unfortunately one which has been very effective. The extent of satanic visions still continues to this day. The recent death of Diana Princess of Wales sparked off great love and adoration for this woman. In fact the grief of the British people was such, that it was as if Diana was something divine. No sooner had the mourning of Diana reached its peak, that visions of her were already being seen at Hampton Court Palace! If these visions did occur, the desire of Iblis and his army of Jinn to capitalize on this event, was evident. Such visions are clear attempts by Iblis to lead mankind away from the path of Allah .
 An informative book on the world of the Jinn is Ibn Taymeeyah’s Essay on the Jinn
Source : The World of the Jinn, Invitation to Islam, Issue 4, January 1998