Illogical, captain...

Dutch Bend Library is the only main library open today. Catty and Helminthdale would normally be open but both are shut for refurbishments.

Dutch Bend had a request to provide cover for Catty Library.

Q: Why is the one library that's open being asked to provide cover for a closed library?

A: Because Catty and Helminthdale, though closed, are open for Booksale and loan of the Richard & Judy Collection respectively.

You probably could make it up but I wouldn't have the nerve.