Who cares what the book was... it's sounds like it's written by someone educated beyond their level of intelligence!It's a damn fine piece of song, no matter how ya butter it! play it, play it lots, and play it LOUD!
Check out Stephen Fearing's version of it, followed by a kickass version of King Of The Fairies, on his CD "Out To Sea"! It's probably my favourite version so far...
;-)