Though the scene of Archie and Reggie diving appears in the book, the dialogue refers to something that doesn't actually happen in the story.
Although all the Archie sequences form one long continued story, all the "chapters" have individual titles and not chapter numbers; they also have separate pagination (all sequences start with page 1).
Prize-winning letters from Linda Schaffer, Lucille Fialkowski, Susan Gill, Carol Fredericks; entry form for Archie Club.