I dunno that I'd lean so heavily on calling it sweet and cute however,
While I'd like to suggest going by my full review and not a few quick words thrown together just for this post, as you've already mentioned, the letter "I" seems to be completely absent from the review text. Not sure why this happened, but I'll contact Chris on the matter.
But yes, a darker vein does run throughout the book, giving the whole affair something of a fairy tale quality. I'd still say it's a sweet--or maybe touching would be a better way of putting it--little book.