Book excerpt: Trees are symbols of life itself. We cut them down at our peril. Here is a leafy anthology of 12 traditional tales from all over the Earth's surface, from Native North America to New Guinea and from Wales to Nepal. They include tales of high magic, bravery and guile, death and rebirth, each woven around a tree Eric Maddern's and Helen East's spirited storytelling combines with Alan Marks' romantic artwork to create a lively and thought-provoking collection.