Some books (usually textbooks) have manuals, student workbooks, etc.
a. These are not necessarily by the same author as the main text
b. They don’t have the same title as the main text
c. The accompanying manuals, etc., must be shelved together with the main text
i. Use the same call number as the main text, regardless of the manual (workbook, etc.) author and title
ii. After the last line of the call number, add an appropriate descriptive word (manual, workbook, etc.) Use more than one word if needed. Always capitalize and use the singular form
Ex.: New perspectives in abnormal psychology edited by Alan E. Kazdin
An instructor's manual for New perspectives in abnormal psychology by Vincent B. Van Hasselt
Note that the basic call number is the same, even though there is a different author.
Some examples of designations:
Student Manual SuppL.
CD Index (usually for serials)