Books on political science are catalogued in the J Library of Congress classification range. They can be found on the fifth floor of the library.
Here is a breakdown of some the major subclasses:
1. Books are shelved alphabetically by the first letter or letters
2. Books are then arranged numerically by the number following the letter(s)
3. Books are then shelved alphabetically by the next letter and decimally by the following number.
From Queen's University Library, Kingston, Ontario, Canada