Ahh....very good question.
Hbr 4:12 For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.
These "books" you mention, they are but mere words recorded down that make one wise for salvation through the true and living Word of God.
Jhn 1:1 In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things were made through him, and without him was not any thing made that was made.
Hbr 11:3 By faith we understand that the universe was created by the word of God, so that what is seen was not made out of things that are visible.
Col 1:15-16 He is the image of the invisible God, the firstborn of all creation. For by him all things were created, in heaven and on earth, visible and invisible, whether thrones or dominions or rulers or authorities--all things were created through him and for him.
So you see, any "books" that specifically point to the true Word of God, are books that are able to make us 'wise unto salvation' and are 'profitable for correction, training, and doctrine'.