/// <summary>
/// Tries to move to Chapter 1 verse 1 of the previous book.
/// </summary>
/// <returns>true if the move was possible</returns>
public void PrevBook()
{
bool result = (showEmptyBooks) ? curRef.PreviousBook() : curRef.PreviousBook(booksPresentSet);
if (result)
{
UpdateReference();
}
}
