ELOISE IN MOSCOW (70 pp.)Kay ThompsonSimon & Schuster ($3.75).
"I was," reports the tourist, "an angel all over the Krémlin." Decent Marxists, of course, are not supposed to believe in supernatural beings, but they might find it easier to believe in angels than in Eloise, the wildly implausible moppet who usually lives at Manhattan's Plaza Hotel with her nanny, dog Weenie and turtle Skipperdee. Two years ago her devoted biographers, Nightclub Comic Kay Thompson and Illustrator Hilary Knight, described how she cut a rug at Maxim's in Paris. In this, her fourth appearance, Eloise dons raccoon coat and diplomatic pout to travel...