Christian Audio is offering John Piper’s great book about the importance of Christian thinking as its free download of the month:
Piper urges us to think for the glory of God. He demonstrates from Scripture that glorifying God with our minds and hearts is not either-or, but both-and. Thinking carefully about God fuels passion and affections for God. Likewise, Christ-exalting emotion leads to disciplined thinking. Readers will be reminded that “the mind serves to know the truth that fuels the fires of the heart.”
I highly recommend reading or listening to this book.