The drama behind an upcoming pet parade, told in epistolary style.Simon, Andy's cat, is writing to Baxter, Andy's dog. Simon invites Baxter to march in the upcoming pet parade, taking Simon's place. Baxter replies affirmatively with wriggly enthusiasm and atrocious spelling. When Simon asks Baxter what his costume will be and reminds him to be more attentive to his spelling, Baxter writes back that the costume is a secret, that "speling is…not vary fun," and that he has given Simon the nickname of Cat Man. Simon says he doesn't want a nickname, but Baxter persists, insensitively. While Simon is unfailingly polite in his epistolary quest to find out what Baxter's costume is, readers may detect in the responses he receives that he is not altogether an innocent party. Nevertheless, many of those responses are noticeably ungracious. And Baxter, with his willful dismissal of Simon's feelings, adds to the story's pervasively subtle mean-spiritedness. Backmatter gives a "Doggie Dictionary" that translates Baxter's ubiquitous misspellings into proper words, but as a device, his habit is more intrusive than cute, often forcing readers who are trying to master spelling themselves to sound out what should be sight words to glean meaning. Andy is White, as is his chief competitor, and his friend Noah is a child of color. Atteberry renders expressions well, but the goldfish with the big red lips and long eyelashes is tiresomely stereotypical, as is the apparently elderly snail delivering the letters.Too mean-spirited to be really funny. (Fiction. 6-8)