\documentclass[12pt,a5paper,titlepage,oneside]{book}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[
    type={CC},
    modifier={by-sa},
    version={4.0},
    hyphenation={RaggedRight},
]{doclicense}
\setcounter{secnumdepth}{0}
\renewcommand*\rmdefault{ptm}

\begingroup
\makeatletter
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\gdef\verseinput#1#2{%
{%
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\def^^M{\@ifnextchar^^M\par{\ifhmode\break\fi}}%
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\begin{document}

\frontmatter

\title{Varige mén, ingen smerte}}
\author{Harald Eilertsen}
\date{September, 2017}
\maketitle

\doclicenseThis
\newpage

\mainmatter
\verseinput{skapet.txt}{Hvor skal skapet stå?}
\verseinput{himmelskipet.txt}{Himmelskipet}
\verseinput{autokorrekt.txt}{Autokorrekt}
\verseinput{dommedag.txt}{Dommedag}
\verseinput{vingeslag.txt}{På kunstens øredøvende vingeslag}
\verseinput{zombier.txt}{Zombier}
\verseinput{erotisk.txt}{Rotgrønnsakserotikkpoesi}

\end{document}