The new trend of e-collections with new technologies has given readers ample alternatives to experience the novel ways of reading it. Where an ease for users has been produced with e-resources; the challenge arises for managing e-collections has puzzled for libraries. It becomes more complicated when libraries need to develop E-Resource Management Systems (ERMS) not only for carrying off e-collections throughout their life cycle but also for aiding collection-development decision making. Therefore to provide a resolution to libraries based on cost effectiveness for managing e-collections and an easy way for users to utilize it, this paper introduces an open source software Calibre as an ERMS. Calibre helps to acquire, create, manage and also assists user to read open books on any eReader.