Black Dog. Band 16/Sapphire, Paperback/Harriet Goodwin

Annie, George and Jed are on a school camping trip, and their team hasn't been doing very well in the activities they've been set. There is one final task - an orienteering exercise in the nearby woods - and they're determined to win. But will their differences in opinion hold them back, and what is the howl they've heard deep in the woods?