dynamic-module.rb

module AttributeAccessor
  def self.for(attr_name)
    Module.new do
      attr_accessor attr_name
    end
  end
end

class Book
  include AttributeAccessor.for(:title)

  def title
    "#{super} + super works!"
  end
end

book = Book.new
book.title = "Dynamic module with Module.new"
puts book.title