Harris (Duke University, USA) Cooper 
Research Synthesis and Meta-Analysis : A Step-by-Step Approach [PDF ebook] 
A Step-by-Step Approach

The Fifth Edition of Harris Cooper’s bestselling text offers practical advice on how to conduct a synthesis of research in the social, behavioral, and health sciences. The book is written in plain language with four running examples drawn from psychology, education, and health science. With ample coverage of literature searching and the technical aspects of meta-analysis, this one-of-a-kind book applies the basic principles of sound data gathering to the task of producing a comprehensive assessment of existing research.