Hello everybody, We have our main library and several libraries all over the country. Now we need these things: 1. Every librarian can see all books (that is easy). 2. A librarian CAN NOT borrower book which is not in the OWN LIBRARY (not idea) 3. If a user want a book from one library, the librarian can ask to the LIBRARY to LOAN the book, and in this case, the LIBRARY with the book, can transfer the book to the other (not idea). Any help? Thanks. -- *Luis Moisés Rojas P.*