Cloud computing is the essence of future computing needs that has emerged to be a savior for library professionals. It is an emerging technology characterized by an element of novelty where the research community has recently embarked. Since, 2008 explosively increasing amount of research has been conducted. This paper presents a descriptive literature review of cloud computing paradigm from vivid perspectives. There has been drastic shift in the trinity of libraries: books which have become electronic, user which prefers web resources than print and the staff which has become cybrarian. In this changed library landscape there is need to shift our competencies for the challenges offered by IT.