This is not the era where to collect so many books as hard-copy then displayed on the shelves, and dusty. In this digital era, almost everything can keep in the computer. Why not do the same thing to your favorite books collection? The main requirement is you have to change all the hard-copy books to the soft-copy form or digital first. E-book, that is the popular name from the digital book can be collected become one, and organized easily with this new application. No matter how many your book collections stack are, you still can makes the easy and simple management thru this application. The unique from Calibre is free to use.