The late Rev Dr John Mallison was a consultant and trainer in leadership development in many fields of church growth and renewal. He mentored Christian leaders in Australia and internationally throughout his ministry. See his website – www.johnmallison.com – for free resources on Christian mentoring. It also includes resources for mentoring training.
You can download a free PDF of his book ‘Mentoring to Develop Disciples & Leaders’:
John also made a major contribution to church small groups (or cell groups) through writing books and training leaders. His final book on small groups – ‘The Small-Group Leader’ – contains the key elements of all he wrote on the topic. You can download a free PDF of it from his site.