Only the lightest wear from handling. An unmarked, clean, and solid copy in VG+ condition. See photos.The Performance of Open Source ApplicationsSKU: 285427425831 $20.00 Regular Price$18.00Sale PriceQuantity*Add to CartBuy NowAuthorTavish ArmstrongPublication Date2013ISBN9781304488787ConditionVery GoodPublisherLulu Press, Inc.