If you believe on a spirit being, then you maybe believe in God also and on the real one sacred book of a religion, mostly if you've experienced a paranormal activity, such as by playing the prohibited Ouija board. Always remember that it is forbidden on the Bible! To those who are willing to use it, do not continue what you've planning. And if you've already tried it, just don't do it again!
The second thing you must need to know is the real religious text where we could lean on. If there's a spirit being, of course there's also a real sacred scriptures for our soul, for the spirit which is in our physical body, and for the knowledge of the truth. One of the ways to prove if the religious text was authenticated, is when it tells about the knowledge of something before it happens, such as what have said by the God of the Holy Bible.
Therefore, one of the contenders for the real book of truth is the Bible. There are many other sacred books which are also a contender, such as the Quran literally means as "the recitation" written by Muhammad as the central religious text of Islam which Muslims consider the verbatim word of God, and the Buddha's gospel by Gautama Buddha also known as Buddha which is commonly means as "the awakened one", or even the Plato's writings. But did we ask ourselves if the content therein those books or therein the sacred book where you've lean on, is the book which also have foretell or predict what is to come?