METHOD OF PROVIDING USER INTERFACE FOR RETRIEVING INFORMATION ON E-BOOK AND SERVER USING THE SAME

User interface for retrieving information on an e-book is provided. The server acquires information on complete-reading probabilities including information on a first complete-reading probability to information on an n-th complete-reading probability and information on complete-reading expected times including information on a first complete-reading expected time to information on an n-th complete-reading expected time; provides a first UI element capable of allowing the information on the complete-reading probabilities to be set and a second UI element capable of allowing the information on the complete-reading expected times to be set; and in response to detecting that information on a specific complete-reading probability range set through the first UI element and information on a specific complete-reading expected time range set through the second UI element are inputted by the user terminal, retrieves information on one or more specific e-books and then provides the retrieved information on the specific e-books to the user terminal.