Information on the dangers of using ROC-AUC as a performance evaluation metric:

• Lobo, J. M., Jiménez‐Valverde, A., & Real, R. (2008). AUC: a misleading measure of the performance of predictive distribution models. Global Ecology and Biogeography, 17(2), 145-151. — http://www2.unil.ch/biomapper/Download/Lobo-GloEcoBioGeo-2007.pdf
• Sokolova, M., & Lapalme, G. (2009). A systematic analysis of performance measures for classification tasks. Information Processing and Management, 45(4), 427-437. — http://rali.iro.umontreal.ca/rali/sites/default/files/publis/SokolovaLapalme-JIPM09.pdf

Additional resources on decision trees:

• Breiman, L., Friedman, J., Olshen, R. and Stone, C. (1984) Classification and Regression Trees. Chapman and Hall, Wadsworth, New York.
• Breiman, L. (2017). Classification and regression trees. Routledge.