Aircraft Spotters,
“Spotter” guide to the world's latest civil and military aircraft embraces fixed-wing and variable-geometry aeroplanes and rotorcraft of over a score of national aircraft industries. It describes approximately 140 individual aircraft types.
The Observer's Books were a series of small, pocket-sized books, published by Frederick Warne & Co in the United Kingdom from 1937 to 2003.
It has basic information on the world's latest aeroplanes and most recent versions of established aircraft types including the newest fixed-wing aeroplanes and rotocraft of 18 countries, arranged alphabetically for civil and military aircraft and then alphabetically again for helicopters.