Michael Morpurgo 
Tom’s Sausage Lion 

But it’s true, ‘ Tom shouted. ‘It was a real lion, I know it was.’No-one believes Tom when he says he has seen a lion — padding around the orchard with a string of sausages in its mouth! No-one, that is, except for Clare, the cleverest girl in the class. Together, she and Tom plan to prove his story is true — by catching the lion!