Policy Evaluation - book recommendation

If you are looking for a book on the topic, I would recommend you this one:  Program Evaluation: Alternative Approaches and Practical Guidelines (Fitzpatrick, J. L.; Sanders, J.R.; Worthen, B.R.) - Portuguese version here.

I would also recommend this LSE Public Lecture on Academic impact on policy-making (particularly the Session B: A ‘how to’ guide to measuring your own academic impact)