The Observer's Handbook is one of our two chief publications. For many international observers, our Society is that publication. For some, the Observer's Handbook is the leading English-language "pocket" ephemeris, reigning among mid-level ephemera designed for field use, in the class below the grand national ephemera supported by cutting-edge celestial dynamics and the latest astrometry produced by HM Nautical Almanac Office and the USNO, and the Bureau des Longitudes and the IMCCE. It is a proud, useful, and vigorous heritage.