From the creators of I'm Not Missing, Bumble the dog's life is turned upside down when his investigation into a mysterious, UNWANTED visitor uncovers his new sibling - a cat! Will they fight like cats and dogs, or will Bumble learn that his little sister is the cat's pajamas?

I don't want to sound paranoid, but I swear something's been watching me.

After his adventure running away, life has been going wonderfully for Bumble the dog since coming home. Well, at least it was, until some strange things start to happen. Hairballs litter the house, scratch marks are appearing everywhere, and Bumble is sure someone's been watching his every move. Who could this mysterious intruder be?

Find out in this hilarious picture book by the author/illustrator team that brought you Poe and Lars and I'm Not Missing!