Library of Emotions

The library I imagine holds books that keep track of a person’s emotions over their lifetime.  Each book in the library keeps track of whatever a person feels day to day, and how their emotions have influenced their thoughts.  The library would also have reference books that allow for a researcher to determine patterns and progression of the person’s emotional responses.  Ultimately, all the data gathered from the books and pieced together using the reference books would allow a researcher to more clearly understand what type of person the library was keeping track of.