zer0her0

require 'rubygems'
require 'nokogiri'
require 'httparty'

doc = Nokogiri(HTTParty.get('http://www.gutenberg.org/wiki/Harvard_Classics_(Bookshelf)'))

ids = doc.css('a').select{|a| a.attr('title') =~ /ebook:/ }.map do |a|
  a.attr('title') =~ /ebook:(\d+)/
  {:title => a.text, :id => $1 }
end.compact.uniq