What is the best book in cloud computing ?

#1 – Cloud Computing Explained: Implementation Handbook for Enterprises (John Rhoton)#2 – Cloud Computing and SOA Convergence in Your Enterprise: A Step-by-Step Guide (David S. Linthicum)#3 – Cloud Application Architectures: Building Applications and Infrastructure in the Cloud (George Reese)#4 – Cloud Security and Privacy: An Enterprise Perspective on Risks and Compliance (Tim Mather)#5 – Enterprise Cloud Computing: A strategy Guide for Business and Technology Leaders (Andy Mulholland)