One of the books my sister got me for Christmas was a former library book, from a Catholic school in Texas (odds are it passed through a few resellers between them and me, though). One thing that intrigues me is that the "due date" bookplate in the back shows a flurry of activity in the course of two months and then nothing.
( It went a bit long, so here's a cut )
I know at least a few school librarians read my LJ, any other possibilities suggest themselves to you?