Keith Sherwin is an English academic and author of publications promoting human-powered aircraft and engineering textbooks.
[3] A donation of the remains of the HMPAC Puffin allowed the group to incorporate elements of that craft into their own design, which was called the Liverpuffin.
[3] During the 1970s, Sherwin authored several articles and books on the topic of human-powered flight, with the Liverpuffin being incorporated into his writings.
His second book - To fly like a bird - appeared in 1975 and was non-technical in nature, with it surveying recent HPA projects and analysing their success or otherwise.
[3][4] In 2007, Sherwin published his third HPA book - Pedal Powered Planes - with it incorporating details of significant HPAs which dated from the late 1970s on through to the 1990s.