neilesmith,
i have that exact same "calypso" book. I did not buy it for the calypso, but something else, a "part" of the calypso. The book is more of an "artistic" collection than an "accuracy" document. however, it does have a chapter labelled "Anatomy of Calypso" which may help, and of all things, the inside front cover and back cover have a lining that maybe best described as a "plan", with enough info in them that you could probably draft lines for an accurate hull from them.
FYI, I bought it for the illustrations on page 52. luckily for me, i was able to find it used on ebay for $10 plus shipping.