ANSWER:

Yes, he is. The concept is to believe in all books of Allah even if he doesn’t know them all! 

When a muslim doesn’t know the pillars of Iman well. For example he believes in the books off Allah but he doesn’t really know what those books are except for the Qur’an, the thaurah and the Bible, what is the ruling, is he considered a muslim?

Belief in Divinely-revealed Books |