Most of the major data breaches that occurred in 2014 took place with transactions at store level, not with online purchases. Not so with Sourcebooks, the popular online bookstore. The shopping cart of Sourcebooks was compromised between April and June of 2014. Hackers were able to steal names, addresses, credit card numbers, expiration dates, card security codes and email addresses. Sourcebooks reported that 5,204 customers were affected by the hack.