Not all books that are read are checked out. I think that some kinds of books should have a sheet or something so each person who reads it in the library can l

Not all books that are read are checked out. I think that some kinds of books should have a sheet or something so each person who reads it in the library can leave a mark. I'm still angry about the Dirac library moving a beautiful 1890's book on steam engineering to storage because "no one was checking it out". Of course no one was checking it out, it was a reference work!