This was one of the first:

http://www.christianitytoday.com/pastors/2006/march-online-only/roundtripdocumentary.html

As far as we can tell, it has fallen on hard times, right? Does anyone know where it can still be purchased? In light of the fact that it’s likely out of print, the question is, which curriculum is the best? Is there anything quite like “Round Trip” to replace it? What’s your opinion?