Impact Evaluation In Practice

OK, that title sounds a little boring, but I just browsed through the newest edition of the book, and I'm really impressed. The book focuses on randomized control trials--especially in developing countries, but there are also chapters on all of our favorite empirical techniques (RD, DiD, etc.).  I especially like the sections describing the limitations of each of the techniques and the checklists.  Super easy and fun to read. The book has pictures and everything! Plus, it's free.