John D. MacDonald (the original?) ran into trouble. There are arbitrarily many color terms, but past the big eleven they start to sound somewhat silly. Let’s face it, “indigo” is just there to fill out the acronym in “Roy G. Biv,” and “The Dreadful Lemon Sky” sounds pretty desperate.
Janet Evanovich, obviously, is set for this life and the next. Well done, Janet! Though I have to say I read one of these and I don’t think the title had anything to do with the story.
Sue Grafton is probably fine; I don’t think she wants to write twenty-seven of these. [In fact that article says she doesn’t.] I just hope that she’s got something good in mind for ‘X’.
Harry Kemelman completely played himself.