Reddit mentions of In the Land of Believers: An Outsider's Extraordinary Journey into the Heart of the Evangelical Church

• "In the Land of Believers: An Outsider's Extraordinary Journey into the Heart of the Evangelical Church" by Gina Welch is about a woman going undercover into that whole world. Not sure if they're quite as fundie as the Duggars, but similar.
  
  
• "Pure: Inside the Evangelical Movement That Shamed a Generation of Young Women and How I Broke Free" by Linda Kay Klein came out recently, about the damaging effect the whole "no sex until marriage" purity culture has had on people.
  
  
• Someone else mentioned this already, but "The Unlikely Disciple: A Sinner's Semester at America's Holiest University" by Kevin Roose is one of the most fascinating nonfiction books I've ever read. The differences between a secular college experience and a Christian one are shocking. Highly recommend!
  
  
• In that same vein, "God's Harvard: A Christian College on a Mission to Save America" by Hanna Rosin is about an Evangelical Christian college that I imagine is somewhat similar to Crown College, the joke of a college some of the Duggar kids seem to have attended a bit before dropping out (I think Joe for a semester or two?)
  
  
• Someone said "Papa Pilgrim" -- I think they mean "Pilgrim's Wilderness: A True Story of Faith and Madness on the Alaska Frontier" by Tom Kizzia, about a fundie man who takes his large family to live in the Alaskan wilderness.

Maybe you should try reading this, first. http://www.amazon.com/Land-Believers-Outsiders-Extraordinary-Evangelical/dp/0805083375