When Helping Hurts: Alleviating Poverty Without Hurting the Poor. . .and Yourself
by Brian Fikkert, Steve Corbett,
Serving with Eyes Wide Open: Doing Short-Term Missions with Cultural Intelligence
by David A. Livermore
The Irresistible Revolution: Living as an Ordinary Radical by Shane Claiborne
And there's these self published books based on Trace's own photography