Has anyone found a good source of the evolution (as well as the dead ends) of catamaran design that tie the Shearwater of the fifties in England through today? It would be interesting to find a book that details the 50's, 60's and 70's design experiments as well as comments from the people who sailed them. I think some of the Shark crowd may remember some of the great old boats as well as some of the duds...i.e. Aqua Cat and Sizzler.