I didn't know about those books. They look interesting. Thanks for the information.
I did some weekend beach camping trips with friends in sea kayaks at some of the Aegean islands and I can tell you it's wonderful. Especially when you reach small beaches without access from the road and you have the whole beach for yourself.
I like Welsford designs and they have very good reputation. I haven't carefully studied his smaller boats. I will do it now.