Going through my spreadsheets and receipts tonight in preparation for meeting with an accountant tomorrow, I realized that I purchased 68 books in 2011 (I'm not counting journal subscriptions, or books purchased at libraries). I spent about $290 overall.
Only 10 of those books were print, and their combined cost was about $185.
The rest were e-books. For 58 of them, I only spent about $105.
Ain't that something?
EDIT: Actually, I did buy several print books at last year's AWP, maybe a dozen or more, and probably spent about $150 or so, but unfortunately I don't have any receipts. Still, I think it's fair to mention that as well.