A book drop is the small metal door in the wall of the building where people can return books when the library is closed.
VOA: special.2009.02.23
The trustees are working to do their part on behalf of clients and creditors of MF Global but authorities with the ability to file criminal charges appear to have closedthebooks on the MF Global mess.
When asked about Sonangol's closedbooks and the flow of industry revenues, Martins was quick to suggest that the oil money is being used for Angola's rebuilding efforts.