The answer referred to above involves Koma and deals with a single chapter. I have not been able to make any use of the answer in my case where the document class is book and where I want to deal with all chapters.
I would like to define a titletoc command which, like \chapter* suppresses the word Chapter and the chapter number in the title of the chapter but produces both a table of content entry and a running head, both without the word Chapter and the chapter number.
As it turned out, though, the question had indeed been asked and, as @Johannes_B finally pointed out in a comment, an answer given at Creating unnumbered chapters/sections (plus adding them to the ToC and/or header) To wit, \chapter* need not be redefined but two lines need to be added. Seems a bit clunky but a macro to insert chapter* along with the two lines can do the job.
Correction: The two lines were given in the question referred to above, by @egreg, but hidden in a comment. :-(
Here is a MWE with the additional two necessary lines indented:
\documentclass[11pt]{book}
\usepackage{titletoc}
\usepackage{hyperref}
\begin{document}
\tableofcontents
\chapter*{One}
\addcontentsline{toc}{chapter}{One}
\markboth{\MakeUppercase{One}}{\MakeUppercase{One}}
Text
\newpage
Text Text
\newpage
Text Text Text
\end{document}

titletocfor the book so it has to work fortitletoc2. I saw the suggested question but a) it involves KOMA and b) was for only one chapter, namely the Introduction. That was not my question which was how to redefine\chapter*, that is it should work for all chapters---and withhyperref. 3. I tried yourunnumberedtotoc.stybut got "Illegal parameter number in definition of \addchap" And, as a LaTeX illiterate, I have no idea what to do. – schremmer Mar 23 '18 at 17:23titletocis the wrong tool, it is a screwdriver, but you need a hammer.titletochas nothing to do with what you want. Anyway,unnumberedtotoccan help you, but you state that there is an error, but don't give a clear indication what the error is. Please edit your question and incorporate an up to date minimal working example. Also, have a look at https://tex.stackexchange.com/questions/35433/creating-unnumbered-chapters-sections-plus-adding-them-to-the-toc-and-or-header I also think the answer below is very bad, one wouldn't do that. – Johannes_B Mar 24 '18 at 06:32frontmatter, who know? – Johannes_B Mar 24 '18 at 06:38