Best for me was'
1. Crisis of Conscience (of course)
2. In Search of Christian Freedom (finished the job)
3. Gentile times Reconsidered (totally blew away the 607-1914 possibility, then I was really free)
4. More Jesus, Less Religion by Steve Arterburn (taught me how damaging legalistic religion can be and how real christianity should be)
5. Combatting Cult Mind Control. (Saw for the first time how I was controlled and why I fell for it for so long)