Paul Humphreys 
The Chances of Explanation [PDF ebook] 
Causal Explanation in the Social, Medical, and Physical Sciences

This book provides a post-positivist theory of deterministic and probabilistic causality that supports both quantitative and qualitative explanations. Features of particular interest include the ability to provide true explanations in contexts where our knowledge is incomplete, a systematic interpretation of causal modeling techniques in the social sciences, and a direct realist view of causal relations that is compatible with a liberal empiricism. The book should be of wide interest to both philosophers and scientists.
Originally published in 1989.
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