\documentclass[12pt]{book}

\input{../../header}

\lstset{inputpath=../code}
\graphicspath{{images/}}

\typein[\pagenumber]{Number of first page}
\typein[\chapternumber]{Chapter number}
\setcounter{page}{\pagenumber}
\setcounter{chapter}{\chapternumber}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document} 

\include{spectral}

\end{document}