fancyhdr novel's pages need headers with CHAPTER ONE, TWO etc. spelled out

Question

I'd like to use the fancyhdr package to have odd number pages with the chapter number spelled out, for instance, "CHAPTER ONE" OR "CHAPTER TWO" etc., and the even number pages with the actually title of the chapter, for instance, "ESCAPE FROM DARTHAN"

So far, I've learned that the package contains these macro commands.
\thechapter generates the chapter number, for instance 1, 2, 3, 4, etc. \chaptername generates the word "Chapter" \chaptermark generates the title

Since this is a literary work, I'd like it to appear less technical, and use words instead of numbers. It's common in popularly published novels to do that, so I hope LaTeX has that capability.

FYI, Koma Script Book Class scrbook doesn't use the fancyhdr package for headers, but has it's own macros book headers that might be able to solve it. I believe the Memoir Class does use fancyhdr package for book headers though.

Is there a way I can get \thechapter to print ONE, TWO, THREE etc? Or, is there another LaTeX way I can do that, perhaps using the scrbook or memoir class?

Answer 1

I still think, this question is a duplicate to @egreg's answer.

We use scrlayer-scrpage with some of the newest features, so an up to date TeX-distribution is needed.

We first clear all the predefined fields (1), remove the chapter number from the our left pages (2), put the leftmark, which is our chaptertitle, in the center of even pages (3). Put the name of the chapter and the spelled out number (using package fmtcount) in the center of odd pages (4), add a page number in the footers center. We set the header to use small caps on the right place (5).

Later we define a command, that just prints some dummy text for testing.

\documentclass{scrbook}
\usepackage{scrlayer-scrpage}
\usepackage{fmtcount}
\usepackage{blindtext}
\clearpairofpagestyles%1
\renewcommand{\chaptermarkformat}{}%2
\cohead{\leftmark}%3
\cehead{\chapapp\ \numberstring{chapter}}(4)
\cfoot*{\pagemark}
%page number on all pages
\addtokomafont{pagehead}{\scshape}%5
%small caps headers, make it more *novelly*
\newcommand{\dasEnte}[1]{\chapter{#1}\blindtext[10]}
% i don't want ducks to die
\begin{document}
\dasEnte{Donald}
\dasEnte{Daisy}
\dasEnte{Gustav}
\dasEnte{Tic}
\appendix
\dasEnte{Mickey}
\end{document}