int book = bookList.getSelectedIndex();
if(book == -1) return;
String ref = bookList.getSelectedValue().toString() + " " + c + ":" + a + "-" + b;
ScripturePassage p = new ScripturePassage(curScripture, ref, perSlide);
Display.getDisplay().prepareNextBackground(ScreenRunner.currentStyle, p.getStyleType());
Display.getDisplay().prepareNextSlide(p, 1, ScreenRunner.currentStyle);
Display.getDisplay().applyChanges();
if((start + perSlide) <= end) {
startVerseList.setSelectedIndex(startVerseList.getSelectedIndex() + perSlide);