The list is not exhaustive and is being constantly updated:

Byrgrave, L 2014 Data Privacy Law: An International Perspective

Carey, P 2009 Data Protection: A Practical Guide to UK and EU Law

Gutwirth, S et al. 2011 Computers, privacy and data protection: an element of choice

Gutwirth, S et al. 2013 European data protection: coming of age

Gutwirth, S et al. 2012 European Data Protection: In Good Health?

Kulesza, J 2012 International Internet Law

Kuner, C 2013 Transborder Data Flows and Data Privacy Law (Hardback)

Sotto, L 2013 Privacy and data security law deskbook

Wright, D 2012 Privacy Impact Assessment


More books on data protection available here