There are two things you need to know in order to locate a physical book in the library:

• the DU library it's located at
• the call number to find it on the shelf

Also keep in mind:

• the location of the book you want. If it is not located at your campus library, click on the request copy link to place a request to have it sent to your campus library. 
• the status of the book and if it is available to check out. If not, place a request to be next in line to check the book out.
• browse the section on the shelf  for more relevant books. Your catalog search could lead to more than one call-number section too find books.