.withSection(new EpubMaker.Section('bodymatter', 'bodymatter', { title: 'Start of the story' }, false, true)
            .withSubSection(new EpubMaker.Section(null, 'preface', preface, true, false))
            .withSubSection(new EpubMaker.Section(null, 'part-1', { title: 'Part 1' }, true, false)
                .withSubSection(new EpubMaker.Section(null, 'chapter-1', ch1, true, false))
                .withSubSection(new EpubMaker.Section(null, 'chapter-2', ch2, true, false))