Bukolla is a very beautiful brown cow, so when she goes missing Frida cannot return home without her. But up in the mountains, she discovers that Bukolla isn't only good for making milk ... Can this clever beast use her magical powers to outwit a pair of devious trolls? Children will fall in love with this story with its engaging rhymes and vivid illustrations.TreeTops Greatest Stories offers children some of the worlds best-loved tales in a collection of timeless classics. Top children's authors and talented illustrators work together to bring to life our literary heritage for a new generation, engaging and delighting children.The books are carefully levelled, making it easy to match every child to the right book.Each book contains inside cover notes to help children explore the content, supporting their reading development. Teaching notes on Oxford Owl offer cross-curricular links and activities to support guided reading, writing, speaking and listening.