Puns and pranks abound in Happy Haunting, Amelia Bedelia by Herman Parish, illus. by Lynn Sweat. Here the heroine's comic misunderstandings take on a spooky bent as she helps prepare for a party (e.g., cracking a window). When Amelia says she doesn't have a disguise, Mr. Rogers wisecracks, ""You wear a costume every day,"" commenting on her anachronistic apparel. But Amelia gets the last laugh. (Aug.) .