The Last Circus Tiger (Knitbone Pepper Ghost Dog #2) - Claire Barker

Knitbone Pepper is a friendly ghost dog, haunting the crumbling Starcross Hall with a gaggle of other ghostly pets. When Knitbone and his beloved owner Winnie invite the circus to Starcross, the ghosts are so excited! But amidst the magicians, the acrobats and the clowns, Knitbone senses something beastly in the big top...