indent in \paper for a multiple-books file not working?

[Thomas Morley]

Hi,

while trying to set a \paper in a file with multiple books I noticed
the `indent'-setting is not working.
One can do so in layout, though.

Is it a bug or feature?

All other toplevel settings (header, layout) are respected and/or
modified by new settings inside of the books as wished.

\paper {
   ragged-right = ##f
   indent = 70
}

\header {
  dedication = "for me"
}

\layout {
  \override NoteHead.color = #cyan
  %indent = 70
}

\book {
    \paper { #(set-paper-size "a3landscape") }
    \header { title = "book1" }
    { c'1 }
}

\book {
    \paper { #(set-paper-size "a5") }
    \header { title = "book2" }
    { d'1 }
}


Thanks,
  Harm