PDF Book Store Introduction Reading habit is one of the best characteristics that a man can possess. Once the habit of reading books grows in one, it seldom dies out. It is said that a book is one's best friend in life. By reading a good book, one can not only earn knowledge but also gain experience in life, and realize the eternal truth. A good book can guide one in the right direction in his life's journey. However, reading hard cover books has gone away slowly. As, this is an era of internet and smart technologies, people are so much used to these technologies that many of the current lifestyle and habits are becoming obsolete rapidly. People now like to read books on their smart devices like smart phones, tablets, laptops and personal computers as there is a wide range of reading materials are available in various formats to read in those devices. Bangladesh is also becoming digitalized at a great pace. For this reason, book selling is decreasing in an alarming rate. So, book publishers and writers are having hard times. Also, internet is full of pirated books which are typically made from scan copies of hard cover books. So, the writers can’t get the royalty of books they deserve. Moreover, those books are not user friendly and most of the time, those induce annoyance to the readers. Considering all these key points in mind, we have taken an effort to provide the book lovers a wide range of books in Portable Document Format (.pdf) format at a minimum price so that the thirst of the book lovers can be met. Also, the book publishing industry can revive from their hard times. We will develop a web application that will provide an online interface to show catalog of books, details book description and download books online. We will also include a Business Intelligence (BI) component that will provide Digital Visualization System (DVS) to show the trends and patterns about selling of books. Scope PDF Book Store will provide its visitors with a catalog of books and details information about the books. Registered visitors can download the books and also, can add the books to the shopping cart. The web application will track which categories of books visitor is viewing. According to the viewing history, he will be provided suggestions of books. Visitors with publisher status will be able to view how his books are doing which will be visualized in statistical graphs like bar graphs, pie graphs etc. Additionally, he will be provided suggestion which category of books are trending now. Use Cases The visitors of the PDF Book Store can be divided into three categories. Their roles are described below. Unregistered User  He can view the catalog of books and details about the books  He can register to become registered user Registered User  He can view the catalog of books, details about the books and download those  He can add books to the shopping cart to download later  He can view the shopping cart, remove book from it and download all the books at a time Publisher  Publisher can do what a registered user can do  Additionally, he can add books to the store, edit their details and delete those  He can view the statistical information about his published books