This is a bundle of 12 issues of Scientific American magazines from January to December of 2009. The magazines are in great condition and have been well-preserved. They cover a wide range of scientific topics and are written in English. Each issue was published during one of the following months: January, February, March, April, May, June, July, August, September, October, November, or December. This collection would be a valuable addition to any science enthusiast's library.