There needs to be a balance between the written word and the Word Himself. One is truth, the other is Truth. As veteran has pointed out, the Bible is inspired. We can be taught by the Holy Spirit as we read the Bible, yet we can also be taught by the Holy Spirit by reading another book, or by speaking to someone, through a teaching, etc. The Bible points us to the Spirit and it tells us to walk in the Spirit. The problem arises when we see the Bible as God Himself, God does not live in a book, He lives in us, very similar to when people believe God lives in a building called a "church", and not in us.
We need both and as we read the written word, we get pointed to Him, and as we are pointed to Him, we learn to walk in the Spirit. Our experiences with God can not always be found in the Bible, those experiences are someone else's, and as we follow the Lord's leading, what He leads us to do, may not be found in the Bible either. Each one of us will be taken on a different journey, none will be the same, so the Bible is a good tool for us, and the Spirit is the perfect leader.
God bless you all!