Questia library

As part of the school's provision for students, the Senior school now has access to Questia Library, which is intended to support access to documents and books for students working at a high level, who may also need to do some research and cite particular documents.

There is a large Geography library of over 4000 items...
These include journals, books and other items.
This is a great addition to geography studies.

Does anyone use this ? 
Do you have any recommendations for any particular 'hidden gems' ?