The information needed to locate the physical book is found in the box. The left column shows which campus library has the book: MU Ellis. The middle column contains the call number: PR 6023. E926 Z785 2004. The right column tells you whether the book is on the shelf or checked out. Not checked out means the book is available.
If a book you want is checked out, use the Search MOBIUS button in the center to expand your search to other libraries in Missouri. You can request books from other libraries and they will be sent to you at the Circulation Desk.
Many books on C.S. Lewis have a call number that starts with PR6023.E926. This call number is located in the southern ranges of the 2nd Floor East of Ellis Library (shelf range #89). See this Ellis Library Call Number Location Guide for more call number locations and maps.