Gelman's own book (with Jennifer Hill) also has some good, practical techniques on causal inference. [0]
Morgan and Winship's Counterfactuals and Causal Inference: Methods and Principles for Social Research [1] is also really good. Be sure to get the second edition; it's much better than the first.
Morgan and Winship's Counterfactuals and Causal Inference: Methods and Principles for Social Research [1] is also really good. Be sure to get the second edition; it's much better than the first.
[0] http://www.amazon.com/Analysis-Regression-Multilevel-Hierarc...
[1] http://www.amazon.com/Counterfactuals-Causal-Inference-Princ...