Start with a philosophy encyclopedia from the reference section. As you go upstairs Reference is on the left side of 2nd floor. All of the first six book sets in the list below are on the back side of the first low shelving unit in Reference. There are other philosophy reference books there as well. Since reference books do not circulate, use the copier located next to the elevator. Copying cost is 10¢ per page. Or you may use the scanner located in the computer lab on the first floor of the library.
Search the Library Catalog for books about a philosopher. Type your philosopher's name, last name first, and click the "subject" button (or the "author" button if you want to find books written BY them). Write down the call number and head to the Stacks on the right side of 2nd floor. Most philosophers will be in the philosophy section in which all call numbers start with B.