Christ is the Word of God, but that is distinct from the Holy Scripture, which itself states so (John 14:26, 21:25).
I know the Islam does not accept the Gospels, but the superstitious beleif that a certain book is alone sufficient is shared.
There's NOTHING SUPERSTITIOUS
about TRUSTING SCRIPTURE to say what it means; mean what it says and to be applicable accordingly.
John 14:26
But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
John 21:25
And there are also many other things which Jesus did, the which, if they should be written every one, I suppose that even the world itself could not contain the books that should be written. Amen.
2Ti 3:16
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: