SA for Sept 2012, just got mine in the mail a few days ago, a great issue: http://www.scientificamerican.com/sciammag/ PS: an interesting article on problem complexity http://www.scientificamerican.com/article.cfm?id=searching-for-easy-answers-hard-computational-questions http://www.scientificamerican.com/media/cover/cover_2012-09.jpg