Cloud Computing Law is the most comprehensive book I have come across on cloud law, well worth its price.
Christopher Millard is Professor of Privacy and Information Law at the Centre for Commercial Law Studies, Queen Mary University of London, and is Senior Counsel to the law firm Bristows. He has some 40 years of experience in technology law in academia and legal practice, and is a Fellow (and past Chair) of the Society for Computers and Law. He has led the Cloud Legal Project since it was established in 2009 and has been Joint Director of the Microsoft Cloud Computing Research Centre since it was launched in 2014. He has published widely in the technology law field and is a founding editor of the International Journal of Law and Information Technology and of International Data Privacy Law.