The book, "Aircraft Profile: Lockheed Hudson Mks I To VI" is part of a series of Profile Publications centered on chronicling the development and use of ground-breaking or interesting aircraft during the 20th century.  "Aircraft Profile: Lockheed Hudson Mks I To VI" tells the interesting story of the development and use of the American-built twin-engine, light bomber and coastal reconnaissance aircraft produced initially for the Royal Air Force just prior to the outbreak of World War II.  The Hudson was developed from the Lockheed Model 14 Super Electra commercial transport and almost 2,600 units across all variants were produced between 1938 and 1942.  In addition to being used for coastal reconnaissance & light bombing duties, the various Hudson marks were also employed to deliver agents into occupied France, as well as, for general transport and training duties.  Lookhead Hudsons were flown in numbers by the following air forces during World War II: 1) Royal Air Force; 2) Royal Canadian Air Force; 3) Royal Australian Air Force; 4) United States Army Air Forces; 5) Royal New Zealand Air Force.  The major sections of "Aircraft Profile: Lockheed Hudson Mks I To VI" are as follows: 1) Introduction; 2) Birth of the Hudson Mk I; 3) Initial Hudson production; 4) Australian (Model 414) Mks I & II; 5) British (Model 314) Mk II; 6) British (Model 414) Mk III; 7) British (Model 414) Mks IV & V; 8) The Lend-Lease Bill; 9) Lend-Lease (Model 414) Mks III A, IV A & VI; 10) Hudsons of the RAF; 11) Hudsons - Mediterranean Area; 12) RAAF Hudsons; 13) Hudsons of the RNZAF; 14) Hudsons in American service; 15) Units operating Hudsons; 16) Hudson Marks - Comparative Data and 17) Contract Summary For Lockheed Hudson Mks I - VI.  In addition to an informative narrative, "Aircraft Profile: Lockheed Hudson Mks I To VI" includes the following features: 1) 43 vintage black and white photographs; 2) 10 color side aircraft profiles and 3) 1 Five-view color illustration of Lockheed Hudson (Mk III, RAF Serial T 9465) operated by 269 Squadron, RAF Coastal Command, late 1941, Kaldadharnes, s.e. Iceland.  This book is sure to appeal to both aviation enthusiasts and modelers alike. This book is 23 pages and is in very good condition.  The author is Christopher F. Shores, ARHistSoc.  Edition published in April 1973.