Because books are classified by subject, you can often find several helpful books on the same shelf, or nearby. For example, within the same call number LB2395, there are other guides for college study.
Here is a list of call numbers, with explanations of how they were put in order:
Here is how they would look on the shelf. You will notice that the LB2395 books all deal with similar subject content.
Illinois State University
Campus Box 8900
201 North School Street
Normal, Il 61790-8900