Spiritual men and women hunger for spiritual food, and feast on it wherever it is.
But always make scripture itself your primary source. All great books, no matter how great, are “pre-digested” food, with truth gleaned by other saints......from where? Mostly from their feasting directly on God’s Word.
First-hand revelation from God is always better than 2nd hand. It is yours, and cannot be taken from you. Both require the Holy Spirit though.
......”Always make scripture itself your primary source”......
As much as I appreciate any number of extrabiblical sources, they are indeed assistants to the absolute authority which alone is inspired and inerrant: Scripture
“All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness, that the man of God may be complete, equipped for every good work” (2 Tim. 3:16–17)
Scripture is enough because the work of Christ is enough.
The question always is whether we will open our Bibles and bother to listen.