Q. How do I determine if a book is in one of the other consortium libraries?

The quickest way is to search for the book in WorldCat. Go to worldcat.org or click on the WorldCat link on the library website.  If the book is owned by the Bethel, United, etc. libraries, that information will be given in the WorldCat record.

The other method would be to search in the catalogs of each consortium library individually.  Links to the catalogs can be found by going to the library website, then Resources => Library Catalogs.