Cfrgtkky

I am writing my thesis with overleaf. I have used a book document class and I am proceeding in the enumeration of the chapters, sections and subsections. It looks fine from section to subsection where I want numbers both in the main file that in the table of contents.

The problem is that for subsubsection I would like to have a bullet (or any kind of pointing symbol) instead of numbers both in the main file and in the table of contents (in both cases indented, even if I think that in the toc it would be automatically indented). I do not know I to fix the problem. I tried with the * to delete the number, but then I do not know how to add the bullet and anyway in the text I would have still the number. Is there someone who could help me? Thanks a lot for your help.
The basic code could be this one

chapter{}
section{}
section{}
subsection{}
subsubsection{}

The last part, that is the subsubsection I would like to have it without numbers both in the main file and in the toc and replacing numbers with bullet or any pointing symbol.

How about this?

documentclass{book} 

setcounter{secnumdepth}{3} % number subsubsections

setcounter{tocdepth}{3} % put subsubsections in ToC

renewcommand{thesubsubsection}{ensuremath{clubsuit}} % no number, fancy glyph

begin{document}

tableofcontents}

chapter{Chapter}

section{Section}

subsection{Subsection}

subsubsection{Subsubsection}

end{document}