This book is part of the successful 'Oxford Reading Tree' series which is used to teach reading in 80 percent of primary schools. The stories within it are about Biff, Chip and Kipper, their friends and family, and the exciting adventures they have together.This book is part of the successful 'Oxford Reading Tree' series which is used to teach reading in 80 percent of primary schools. The stories within it are about Biff, Chip and Kipper, their friends and family, and the exciting adventures they have together.