Data integration helps in arriving at informed decisions and to manage assets efficiently. During the entire lifecycle of operations, starting from drilling to production operations, various disciplines that cover Subsurface (Geology, Reservoir Engineering and Geophysics), Well Engineering, Production Technology, and Asset Maintenance are involved. Each of these domains generates its own specialized sets of data which are maintained in various databases and applications. These disciplines wise fragmented data items can be linked under a hierarchy with either a Well/Reservoir at the top level. Managing key information across the entire lifecycle of a Well/Reservoir then requires combining data from diverse sources and bringing them in one unified view. Electronic Well Book is a key solution that translates this requirement, of having one view from diverse data elements covering various disciplines. Like a physical book, the Electronic Well Book is designed with each well as a chapter and the data elements that capture key events, data gathered, data analyzed and live data are represented as individual pages. The Electronic Well book is a tool that provides one source of data, faster data access, better defined quality checks, and integrates work flows, making collaboration easier. The well book method of information representation ultimately contributes significantly in identifying production enhancement opportunities, which when matured and executed leads to production gains. In addition, the live feed data facilitates monitoring rates/pressures and identifying deviations from the trends, reporting them accordingly in the same chapter, upon which actions to be taken. E-wellbooks fulfill the objective of having only one source of truth, one integrated database, where every team member will find any piece of information with minimum effort, shorter period of time and more efficient manner. The case study presented herewith, demonstrates the pragmatic approach followed in well reviews and the value generated utilizing this novel methodology.