For Amos Sawyer's analysis of the causes of Liberia's political instability that led to the civil wars, and his prescriptions for a civil, democratic regime, see:
Amos Sawyer, Beyond Plunder: Toward Democratic Governance in Liberia (Boulder, CO., 2005).
For an anthropological and personal perspective on the civil war, see:
Mary H. Moran, The Violence of Democracy. (University of Pennsylvania Press, 2006).
For the historical background on the role of African Americans in the creation of Liberia, see:
Claude Clegg, The Price of LIberty: African Americans and the Making of Liberia. (The University of North Carolina Press, 2004).