I absolutely adored this. Simple, eloquent, flowed and rhymed well, and told a story in few words which left a lot of room for imagination. Nice one :)
I'm not really sure how to reply directly. But. Here's my explanation, see the book was supposed to be the book that led them to the nook. Like the journal of another person or something filled with maps and weary scribblings.
I don't know about anyone else, but there was a sort of mystery in this to me and that was interesting. But I do have one question, where does the book come in? I saw where everything else came in but I'm not sure what significance that had in the end.