newcommandmybook[1]{paragraph{B getcurrentref{subsection}-getcurrentref{paragraph}: #1}hfillparvspace{0.2baselineskip}}%

documentclass{scrreprt}
usepackage{etoolbox}

% get currentref command
newcommandgetcurrentref[1]{%
 ifnumequal{value{#1}}{0}
  {??}
  {thevalue{#1}}%
}

% remove label from paragraph, even if numbered
renewcommand*{paragraphformat}{}

% custom paragraph heading
newcommandmybook[1]{paragraph{B getcurrentref{subsection}-getcurrentref{paragraph}: #1}hfillparvspace{0.2baselineskip}}%

setcounter{secnumdepth}{4} % how many sectioning levels to assign numbers to
setcounter{tocdepth}{2}    % how many sectioning levels to show in ToC

begin{document}

chapter{Books (chapter)}
section{Fiction (section)}
subsection{Dystopy (subsection)}

subsubsection*{George Orwell (subsubsection 1.1.1.1)}

mybook{Animal Farm (paragraph)}label{AnimalFarm}

Animal Farm is an allegorical and dystopian novella by George Orwell, first [...]

mybook{1984 (paragraph)}

Nineteen Eighty-Four, often published as 1984, is a dystopian novel [...]
I'd like to reference Animal Farm (ref{AnimalFarm}) as B 1-1 [...]

subsubsection*{Aldous Huxley (subsubsection  1.1.1.2)}

mybook{Brave New World (paragraph)}

Brave New World is a novel written in 1931 by [...]

subsection{Historic Novel (subsection)}

subsubsection*{Ken Follet}

mybook{The Pillars of the Earth (paragraph)}

section{Non-Fiction}
subsection{Cooking}
subsubsection*{Baking}
mybook{Baking without flour}
subsubsection*{Cooking}
mybook{Cooking without water}

end{document}

documentclass{scrreprt}
usepackage{etoolbox}

% get currentref command
newcommandgetcurrentref[1]{%
 ifnumequal{value{#1}}{0}
  {??}
  {thevalue{#1}}%
}

% remove label from paragraph, even if numbered
renewcommand*{paragraphformat}{}

% custom paragraph heading
newcommandmybook[1]{paragraph{B getcurrentref{subsection}-getcurrentref{paragraph}: #1}hfillparvspace{0.2baselineskip}}%

renewcommand{theparagraph}{B arabic{subsection}-arabic{paragraph}}


usepackage{cleveref}

crefname{paragraph}{paragraph}{paragraphs}
Crefname{paragraph}{Paragraph}{Paragraphs}


setcounter{secnumdepth}{4} % how many sectioning levels to assign numbers to
setcounter{tocdepth}{2}    % how many sectioning levels to show in ToC




begin{document}


chapter{Books}
section{Fiction}
subsection{Dystopy}

subsubsection*{George Orwell}

mybook{Animal Farm}label{AnimalFarm}

Animal Farm is an allegorical and dystopian novella by George Orwell, first [...]

mybook{1984}

Nineteen Eighty-Four, often published as 1984, is a dystopian novel [...]

subsubsection*{Aldous Huxley}

mybook{Brave New World}

Brave New World is a novel written in 1931 by [...]

section{Interpretation}

I'd like to Reference Animal Farm (ref{AnimalFarm}) as B 1-1 [...]

cref{AnimalFarm}

end{document}

documentclass[a4paper, 11pt]{article}
usepackage[ngerman]{babel}
usepackage[utf8x]{inputenc}
usepackage{hyperref}


newcounter{book}
newcounter{subbook}[book]

defbookagraph#1{stepcounter{book}stepcounter{subbook} paragraph{B arabic{book} -arabic{subbook} #1}expandafterlabel{bookagraph_arabic{book}arabic{subbook}}}

begin{document}

arabic{book}

bookagraph{Heute}

As seen in nameref{bookagraph_11}

end{document}