One More Sheep

Sam has ten sheep, and he has to be sure, that he's fetched them all in, from the wild windy moor. To do this, Sam has to count them...but everyone knows counting sheep tires you out and sends you to sleep A fantastic counting book told in rhyme and based on the hilarious idea of a shepherd with ten sheep who can't count them without falling asleep. How will he know that the knock on the door isn't a lost lamb but a wolf when he can't count up to ten