Updated monthly since the 40th anniversary of ZIP Code, the latest edition of The DPO Book (Discontinued and Renamed Post Offices in the ZIP Era, 1963-2007) is an excellent resource for postmark collectors, postal historians, and investors. An ideal companion to the PMCC Directory of (open) Post Offices (which no collector or postal historian should be without), the current 2007 version of The DPO Book comes with two free future annual updates. Available only on CD in .pdf format, the DPO Book contains the most accurate closing information possible on more than 13,000+ post offices, including almost 1,400 name changes. It also features more than 1,200 place name origins and 70+ photographs of closed Post Offices. For more information, email The DPO Book editor, or write Jay Lounsbury, 1900 Aberdeen Drive, Dunkirk MD 20754-9732. To order, send your check for $17.95, payable to Jay Lounsbury at that address. A portion of the proceeds will go to the PMCC Post Office Directory project.