\version "2.19.5"
\language "deutsch"
#(set-global-staff-size 17)
\paper {
  #(set-paper-size "a4")
}
\header {
  title = "main"
  tagline = \markup {
    Gesetzt durch Bernhard Kleine mit
    \line { LilyPond \simple #(lilypond-version) (http://lilypond.org/) }
  }
}

\book {

  \bookpart {
  \include "2test.ly"
  }
}