Dilip K. Das & Scott W. Phillips 
Change and Reform in Law Enforcement [PDF ebook] 
Old and New Efforts from Across the Globe

This book provides broad exposure to a variety of policing reforms that have not received adequate attention. It includes information and examples from different countries regarding efforts to change aspects of policing that are problematic or involve changes in the way crimes are committed. Some of the efforts to improve the police are relatively recent (i.e., using social media) and some areas of policing that seem to require frequent attention (i.e., working with the public).