book_title01

class Book
  attr_reader :title

  def title=(new_book)
    words = new_book.to_s.split(' ')
    words.map! { |x|
      if x == words[0]
        x.capitalize!
      elsif x == "the" || x == "and" || x == "a" || x == "an" || x == "of" || x == "in"
        x = x.downcase
      else
        x.capitalize!
        x
      end
    }
    @title = words.join(' ')
  end
end