Calibre is a free opensource application for PC  e-book library management application for personal computers. It is developed by number of e-book users for managing the e-books downloaded by other e-book users.

This software will accomplish your e-book library management as well as device-specific e-book conversion, easy syncing to e-reader devices such as Amazon Kindle, Nook, Sony PRS, BeBook, many Android and iOS devices, downloading and converting news stream from web into e-book format, act as an e-book reader app etc.… Read the rest