And, as it turned out, Yaztromo aka Alessandro Viola did indeed get his gamebook finished first and I've converted it for online play. You can now sail to the new island once you get a boat. If you want a trunk, then for now you can get it
SPOILER
from the market in Isle Of The Cyclops, although it's not essential to have one.
END SPOILER
As far as connections with other books go, it contains one thing not previously mentioned, which is
SPOILER
protection from insects that can steal your soul if they bite you.
END SPOILER
After the next gamebook in this collection, I think I'll remove the 'only a demo' warnings.