The US eReader market has seen more than 60% growth this year and has more than quadrupled since 2009.
According to eMarketer, more than 20 million eReaders will be in consumer hands by the end of 2011, reaching 8.7% of the US adult population.
By 2012, 12% of adults will have a Kindle, Sony Reader, NOOK or similar device.
This follows Amazon’s news that Amazon.com is selling more e-books than print or hardback combined now.
Read the full eMarketer article here.