I've long been a fan of sci-fi book cover art, and one of my all-time favourite images has always been this 1978 image by Colin Hay for the James Blish novel, 'The Star Dwellers'. It also featured in the Stewart Cowley book 'Spacewreck'. 

I took it upon myself to build a 60cm scale model of the spacecraft, and contacted the artist, Colin Hay, for permission and insights for it's construction. I began by making several small paper models to get the shape right.