This is interesting - although the numbers don't add up. The 814.9$M figure for the total doesn't tally with the 905.1$M total for the table (unless I've missed something?) In any case the ebooks increase is encouraging.
The 42% in Higher Education surprised me, so I looked into what percentage of the book market this was.
This suggests 2.2$B total for January 2009 from the census bureau, so perhaps the above data is about a third of the market.
Several points about this interested me:
- why is January such a good month? isn't it dead after Christmas? are they all diet books?
- the market has been almost flat for the best part of 10 years
- the Amazon growth is scary!