"More than forty years of quadriplegia has underscored to me the matchless value of knowing—really knowing—the doctrines of the Christian faith. Dug Down Deep reveals how biblical doctrine provides a pathway to understanding the heart and mind of God. If you're looking for 'that one book' that will push you farther down the road to faith than you've ever journeyed before, Dug Down Deep is it. I highly recommend it!"
- Joni Eareckson Tada, author; founder and CEO, International Disability Center, Agoura Hills, CA

"In Dug Down Deep my longtime friend Joshua Harris explains the basics of Christian theology in a way all of us can understand. He is a humble man and teaches humbly. If you are tired of hyped promises and want essential truth, this book is for you. As religious fads come and go, the truths in this book will last."
- Donald Miller, author of Blue Like Jazz

"When the apostle Peter says, "Humble yourselves under the mighty hand of God…casting all your anxiety on Him," he implies that humble people are fearless. They have the courage to stand up for truth humbly. I love the term "humble orthodoxy." And I love Josh Harris. When they come together (Josh and humble orthodoxy), as they do in this book, you get a humble, helpful, courageous testimony to biblical truth. Thank you, Josh, for following through so well on the conversation in Al Mohler's study."
- John Piper, author of Desiring God; Pastor for Preaching and Vision, Bethlehem Baptist Church, Minneapolis

"Josh says that this book is his 'reveling in theology in my own simple way.' Having read it, I can say that it is also a popular defense of the importance of theology and, at the same time, an introduction to it. I enjoyed reading it. And my mind immediately began to go to how I could use this book. Josh has given me a new tool! It is interesting, well written, and excellently illustrated. Josh has succeeded again in giving us a book that is clear, engaging, direct, solid, easy to read, sound, God centered, balanced, humorous—and it even has pictures!"
- Mark Dever, author; Senior Pastor, Capitol Hill Baptist Church, Washington DC

"As two young guys who have been deeply blessed and influenced by Josh's books and example, we couldn't be more excited about Dug Down Deep and how God is going to use it to transform a generation. It's a gripping and honest read. In it we learned things about our older brother that we had never, in twenty-one years, been told before! But more importantly, we learned things about our Savior that caused us to fall more deeply in love with him and his Word. Get this book. Read it. And join us on a journey to rediscover what has always been true."
- Alex and Brett Harris, authors of Do Hard Things