[AnemicOak]

I've had that on some of my holds in the past. Since some publishers licenses for library books are time limited/limited checkouts they can get to a state of 0 of 0 copies until/unless the library rebuys the book.

For reference HarperCollins limits books to 26 loans, Macmillan to 52 loans or 2 years (whichever comes first), Simon & Schuster for 1 year (experimenting with 2 years for 1.5x the $$$).