• Ptarmigan Books – a little known imprint in the Penguin Books aviary of birds: bibliographic descriptions. Ptarmigan Books was just one of the many special series published by Penguin Books. Hubert Phillips was the major influence in the Ptarmigan series, which reached only nine titles. As well as editing the series he was the author, or co-author, of all but one. In an eight-page self-advertising feature, the series is described as being ‘designed to cover, as comprehensively as possible, the field of Games, Puzzles and Indoor Recreations’.