gistfile1.rb

class AttributeAccessor < Module
  def initialize(*names)
    @_names = names
  end

  def included(model)
    super
    @_names.each { |n| attr_accessor n }
  end
end

class Book
  ATTRIBUTES = [:author, :title]
  include AttributeAccessor.new(*ATTRIBUTES)

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

class Book
  include AttributeAccessor.new(:isbn)

  def isbn
    "#{super} + whoops"
  end
end

book = Book.new
book.title = "I'm not sure of the point"
book.author = "jschairb"
puts book.title
puts book.author
puts book.isbn
puts book.class.ancestors

gistfile2.txt

I'm not sure of the point + super works!
jschairb
 + whoops
Book
#<AttributeAccessor:0x007fa3f9883930>
#<AttributeAccessor:0x007fa3f9883b10>
Object
Kernel
BasicObject