Thanks for your help - both of these return some results, but allow me
to clarify what I am trying to achieve:
I need to compare the data in range A with that or range B. It will be
a library listing of books with no identical entries. Range A will
come from the list of books which have been checked out, while Range B
will be the complete listing of books. A comparison of the two will
(hopefully) produce a list of books not checked out, which can populate
a VB Excel Form.
What type of solution would produce the complete list of
not-checked-out books?

Thanks,
Louis