One of the most perfect books I've ever read. The story is about the relationship between a young girl and her grandmother and is suffused with the glories of the natural world, the humor and pain of childhood, and stripped of any cloying sentimentality. Tove Jansson was a truly incredible writer, and this book sings. It's a book to celebrate, and to remind you that life is delicious and that the world is overflowing with wonder.
Also, the Moomin books are quite possibly my favorite children's literature.