After clicking on the book title of your choice, you will be directed to the Item Record. Along with the book's information, you will find the Call Number in the "Check Availability" section of the record. The Call Number is in the Library of Congress (LOC) form (more information on LOC Call Numbers).
The picture above shows that the book is available by the green check mark and the Call Number is QC981.8.C5 G644 2006. All books are located upstairs either on the IT side (A-K) or the Henderson Building side (L-Z and Cur).