A good book which disagrees with Scripture?

You guessed it. Another weird doctrine by the quotable Martin Luther. In his preface to the Epistle of St. James, he said:

Though this epistle of St. James was rejected by the ancients, I praise it and consider it a good book,...
And then he says:
... In the first place it is flatly against St. Paul and all the rest of Scripture in ascribing justification to works 2:24).....

Now, let me ask you, would you esteem and regard a book as good which flatly contradicts the Word of God?

The Epistle of St. James is also the Word of God and here Martin Luther accuses the Word of God of contradicting Itself. 

What say you?

Sincerely,

De Maria