In the departmental libraries frequently used textbooks and other basic course material is grouped together and shelved separately in the textbook collection.
Each book title is held in several generally loanable copies.
The call number of the textbook collection in all departmental libraries normally is 080 (e.g. QA080).
If all copies are on loan you can check the Catalogue.plus! for further copies that may be shelved in other departmental libraries.