A fantasy adventure that explores grief, and the ways it affects various people, and how joy and memory can help the grieving process. I enjoyed it a lot. Some aspects of the book were a little scary which I imagine would be appealing to 8-12 year olds. Would recommend.
To me, the yarn represents love; the girl starts out by loving herself, and then finds she has more love for others. The more love she gives, the more she has to give. When someone tries to gain the love by force, without her consent, he finds there is no love there; but the girl is able to continue happily loving her world.
Maybe I'm reading too much into it but to me it seemed a perfect allegory for the abundance of love.