I will say that mending can repair a book, but i don't think it will become an issue anyway. I will give y'all a little more to chew on while I get un-busy
Inside the book is a careful log of the captain's journeys, that is, until recently, soon after this trip started, he referred to Iena more often, and soon the entries were little more than badly written love poems for her. And that's about all the useful information you can gather from it, I will let you people work out where to set up camp, the NPCs will abstain from any official vote but will lean toward setting up in the caves, once they've been thoroughly explored, of course, but either will work fine.