Maximum PC: Amazon could hardly contain its excitement over how many Kindle devices it sold on Black Friday and Cyber Monday, the busiest offline and online (respectively) shopping days of the year. According to Amazon, the holiday weekend was the "best ever" for the Kindle family, especially Cyber Monday, which ranked as the biggest day ever for Kindle sales worldwide. It was pretty much the same situation last year, which makes it even more impressive that Amazon managed to double its holiday weekend sales record from 2011.