Gilbert the Goblin infiltrates Santa’s workshop to prove that goblins are better workers than elves in the side-splitting latest installment in The Worst! picture book series, where even the strangest of creatures can become the best of friends. Everyone knows that elves have a reputation of being the hardest workers around—especially when it comes to the holiday season—but as far as Gilbert the Goblin is concerned that’s nothing but ho-ho-hogwash. A goblin’s to-do list is just as long as any elf’s; they just don’t feel the need to sing songs about it. To prove he can...