John Eldredge is an American author and counselor known for his work in Christian spirituality and personal development. He gained popularity with his book, Wild at Heart, which explores themes of masculinity and the journey of men in their faith. Eldredge emphasizes the importance of adventure and the wildness of the human spirit in his writings. In addition to being an author, Eldredge is the co-founder of Ransomed Heart Ministries, an organization dedicated to helping individuals find healing and purpose in their lives. He has written several other books, including Captivating, which focuses on women's spirituality, and he often speaks at conferences and retreats.