Hi Ueli
Yes, there are 4 volumes in french in the library. Some time ago I had scanned them and sent them to the JRA. Later I scanned the other 5 books (Nr.7 and 8 are in one book) and also had sent them to the JRA but they did not appear in the library.
All of them and many other books about junks you can find to download at
https://indigenousboats.blogspot.com/
This is made by Bob Holtzmann, a marine ethnograph of the university of Southampton. I have never seen so much information about traditional boats from all over the world.
Alex