I read a section from a book in my library. It is called 'Hidden Heroes: Evidence that God is at work'. Don Moore and Lorna Dueck wrote it. It has a foreword written by Billy Graham. I would suggest adding this to your library if you get the opportunity.

You can get a copy of the book at the following link: https://www.abebooks.com/Hidden-Heroes-Evidence-God-Work-Moore/2039506891/bd