Cloud computing beginner to researcher has been written for novice as well as researchers. It provides detailed description related to the basic concept of cloud computing. Majority of the topics have been substantiated by ample of examples and screenshot. References has been cited for what has been included. Related work on many of the significant topics has also been given. This book is equally important for business leaders intending to know the insight of the cloud computing. This book is primarily focuses on security, virtualization and business issues related to cloud computing. We hope that this book will be extremely beneficial for all those readers who are intending to know about the cloud computing in simple terms.